The Hangover - the gang blacked out after a night of partying caused by salvia-spiked drinks. Salvia doesn't work like that, and usually wears off after a few minutes, rarely more than fifteen. WHEN SMOKED. It would take massive amounts of it to actually have any effect digested.

In one of the episodes where House quits Vicodin, it only takes him a single night to overcome the withdrawal symptoms. Normally it would take several weeks.

The amazing propaganda exploitation film from the 1930s, Reefer Madness, shown to the "rad kids" that wondered what would happened if they smoked marijuana taught them that smoking weed will make you want to have wild sex, induce violence, or make you want to commit suicide. Riiiight.

In Transformers: Revenge of The Fallen, Judy Witwicky eats a pot brownie by accident which results in hallucinations and needs to be physically restrained. You do realize that pot does the exact opposite of making you aggressive? Get your sh*t right.

The Breakfast Club teaches you about the reaction to smoking pot, which include: stripping down, fist pumping, punching flags, somersaults, punching self in face and rageful screams. Seems legit.

In an episode of Seinfeld, Kramer takes a few sips of scotch and is babbling drunk in less than a minute. He passes out after around 3 minutes. Alcohol doesn't work that fast. You won't get full effects of intoxication instantly.

In American Beauty, Lester buys an ounce of weed and pays... $2000. Whoever wrote that part of the script must've been clueless about how much weed costs. Two thousand bucks? I mean, come on!

The Andy Griffith Show teaches about how you can sober up instantly. Drunk as a skunk? No problem, drink some coffee as it neutralizes alcohol. No it doesn't!

The heroin sequences in Requiem For a Dream include a shot of a pupil dilating. Heroin causes the pupils to shrink, not dilate.

In the movie Bachelor Party, a mule named Max snorts three lines of coke and dies. Whoever came up with that scene didn't know that mules weight over half a ton, and three lines of coke is pretty much like half a line for a human.

In the South Park episode where Kenny gets high on cat urine, him and Kyle's dad get major hallucinations from this "drug." Actually, it's made up - cat urine doesn't have ANY qualities that would get you high.