1. Always wear a bib.
Learned from: The Exorcist (1973)
Complex says: It’s the infamous movie scene that forever spoiled pea soup for horror fans worldwide. Baby-eared viewers might find young Linda Blair’s crass insults (“Your mother sucks cocks in hell!”) more offensive, but we’re still feeling nauseous over her projectile vomiting. A green ooze spouts from Blair’s mouth like a geyser, the priests’ black outfits are covered in the nasty goo. A trip to the cleaners, not to mention a psychiatrist visit, could’ve been avoided if they’d arrived prepared with shirt-protecting bibs. They’d still be susceptible to homicide, sure, but at least their gear would stay fresh to death.