Nightmares where you show up naked for class have their own kind of horror, but the scariest nightmares may be more based in our real battles.

A forum on VeggieBoards shows that many vegetarians actually suffer from "meat-mares," a nightmare based on anxiety of eating meat. One sufferer described a dream in which she watched a butcher chop up a live pig, saying, "It kind of haunted me in a way."

A brief survey of our editors reveals that some of us have experienced nightmares of cheating on their diets, and one former alcoholic sometimes wakes up freaked out after vivid dreams she's been secretly drinking. (Other substance users agree this happens when they go on the wagon.) Even those dreams of your teeth falling out supposedly represent a fear of aging.

It makes sense that major lifestyle choices would find their way into your dreams. After all, being on a strict diet or getting sober take up a lot of headspace during waking hours, so it's natural they'd seep into your unconscious as well. But these nightmares are typically worse than being chased by a witch or fighting a dragon, because they're inspired by reality.

Have you had any nightmares based on real-life fears?