[Summer Bummer clip] Hi, i'm John Green. Welcome to my Salon. This is mental_floss. 1. I'm so glad I don't have Intermittent Explosive Disorder, a condition marked by random fits of disproportionate rage. I'M SO ANGRY! DAAAAAAAH! Anyway, that's just one of thirty-one fascinating disorders we're going to learn about today here on mental_floss. [intro music] 2. To people who suffer from Alice in Wonderland Syndrome other people can look like they've consumed "Eat Me" cakes or "Drink Me" potions. This distortion, caused by a rare kind of migraine, can last for weeks or merely seconds. [Aside] Mark, is Donald Duck Syndrome that disease where your have the dreams about going to school with no pants on? Because if not, they are really missing a naming opportunity there. 3. Are you an elderly woman who's sick of having a recently retired husband underfoot? Probably not, judging by our demographics. But if you are, you might have the aptly named Retired Husband Syndrome, which can actually cause physical ailments, like stomach ulcers and rashes. 4. Studies show that Japanese people are most susceptible to Paris Syndrome, the psychiatric breakdown that occurs when the city of Paris, France doesn't live up to the romantic ideal you've envisioned. Thankfully, the Japanese embassy has a 24-hour hot line for citizens suffering from culture shock. Really. 5. Truman Show Delusion is marked by a patient's belief that he or she is the star of an imaginary reality show. The camera's real, right? ..... 6. It's possible that George Costanza was a victim of Genital Retraction Syndrome or 'Koro', a condition that causes people to believe their genitals are shrinking, disappearing, or have been stolen entirely. Strangely, Koro is occasionally an epidemic. 7. And while we're talking about Seinfeld, let us not overlook the time Kramer had seizures upon hearing the voice of entertainment reporter Mary Hart. This was based on an actual incident in which a woman had epileptic seizures due to the specific pitch and quality of the tone of Mary Hart's voice. 8. Last Seinfeld reference, I swear. On the rare occasion that people laugh so hard they faint, they're said to have something called Laugh Syncope. So when a 62 year-old man passed out into his mashed potatoes because he was laughing so hard at a certain show about nothing, doctors dubbed it 'Seinfeld Syncope'. 9. Rapunzel, Rapunzel, let down your hair - don't eat it! You've probably heard of something called trichophagia where people are compelled to eat their hair. The thing is, hair isn't digestible, so over time it accumulates into a giant mass that can wrap around and perforate the internal organs, which is called Rapunzel Syndrome. 10. Ever walk into a room and immediately forget why you're there? It could be Busy Life Syndrome, which is essentially just information overload. Researchers blame constant stimulation from cell phones, the internet, social media - I'm sorry. That's my fault. 11. Now onto coprographia, coprolalia, and copropraxia. Respectively, those mean making rude drawings or writings, using profane words, and making obscene gestures, all involuntarily. You know, like Jonah Hill in that super bad flashback. 14. Does your strawberry ice cream taste like vanilla? You might have dysgeusia, a disorder that distorts the sense of taste. Or they might have put the red food coloring in the wrong ice cream. 15. Often associated with dysgeusia is Burning Mouth Syndrome. Nearly 1.3 million Americans suffer from it, so right now one of you is probably feeling like you just got hot pizza cheese plastered to the roof of your mouth, even if you haven't eaten recently. 16. Pizza probably wouldn't be at the top of the list for someone with Gourmand Syndrome. Thought to be caused by an injury to the right frontal lobe of the brain, G.S. results in a preoccupation with food and a preference for fine eating. My syndrome does involve preoccupation with food, but it's the opposite, it's really low quality food. I don't know what that's called, it's probably America syndrome. [Libertage music] 17. People suffering from Dr. Strangelove Syndrome often think that they're Peter Sellers. No, Dr. Strangelove Syndrome is actually known as Alien Hand Syndrome, where one hand appears to be controlled by someone other than the person it's attached to, even going so far as to injure the person. Alien Hand Syndrome is also the subject of a terrible 1999 Devon Sawa Seth Green movie, who, by the way, is not related to me. 18. Inserting nonsense words for real words without even realizing it is the result of Jargon Aphasia. It can actually progress to the point where someone suffering from the condition is talking in an entirely made up language. 19. In other news of diseases that would be injurious to my career, Walking Corpse Syndrome. Those with Walking Corpse Syndrome, or Cotard's delusion, think that they are dead or rotting, have possibly lost all of their blood or internal organs, or believe that they never actually existed in the first place. 20. Capgras Delusion is when you believe that a loved one has been replace by an identical imposter. Mmm good try, Mark, but I- I don't love him. I'm just kidding, Hank. If you're Hank. 21. The flip side of Capgras Delusion is Fregoli Delusion, which causes people to believe that many different people are actually just a single person who is skilled in the art of disguise. The first case was reported in 1927 when a woman believe that two local stage actors were constantly following her pretending to be people she knew. 22. Okay, so here's a thing that exists: Purple Urine Bag Syndrome, a.k.a. P.U.B.S. Occasionally, nursing homes report that elderly patients who have been catheterized are producing bags filled with purple pee. It appears to be a harmless condition that is likely caused by certain enzymes mixing with tryptophan, the same stuff in turkey that's supposed to make you sleepy. [Aside] Slightly off topic, but do you think California raisins pee purple? 23. If you wake up one morning with an accent you have no right to have (Madonna), it's possible that you're the victim of Foreign Accent Syndrome. Doctors believe it happens when a tiny area of the brain that controls language gets damaged by a stroke or other brain injury. 24. And now on to Exploding Head Syndrome. Mark, come on. Alright, that's better. People with Exploding Head Syndrome hear loud noises that don't exist, most often waking them up in the middle of the night. The noises have been described as everything from a bomb exploding to cymbals crashing. 25. People who have little to no awareness of time have Dyschronometria. This applies to people who can't even approximate when 30 seconds have gone by, not your brother who is constantly late to everything. 26. Just like The Beatles and Justin Bieber, pianist Franz Liszt had crazed fans, but back in the 1800s the word "mania" had real, medical connotations, so the fact that doctors named the phenomenon "Lisztomania" indicates that it had physical symptoms including fainting and hysteria. Although to be fair, I would likely faint in the presence of the Biebs. 27. Now onto Trimethylaminuria. We're just going to call it Fish Odor Syndrome. It's a metabolic disorder that makes you smell like day-old fish, and there is no known cure or treatment, so that sucks. 28. Smelling odors that aren't really there, that's phantosmia. 29. Smelling something rotten when something should smell pleasant, that's parosmia. 30. And not smelling anything at all, that's anosmia. 31. And lastly we return to the portrait gallery to discuss Stendhal Syndrome. Does seeing that baby octopus thing make your heart race? Does it make you feel faint? Then you might have Stendhal Syndrome. Such people might feel dizzy or faint when in the presence of art they find particularly beautiful or a lot of art. Thank you for watching mental_floss here on YouTube, which is made with the help of these nice people. Every week we answer a fascinating and/or mind blowing question asked by you. This week's question comes from Dean Appplegate who asks "Is it true that hot water freezes faster than cold water, and if so, why?" Yes, due to something called the Mpemba Effect, warm water can sometimes freeze faster than colder water. Though it's a phenomenon that's often been observed, scientists don't really understand it. It may have something to do with the evaporation, or perhaps a layer of insulating frost on the cold water. I don't know, maybe you can solve this mystery. If you have a question you'd like answered, leave it in comments. Thank you for watching and DFTBA.