It's no secret that actors can be tough to deal with. Small, seemingly random things can set them off and throw months of negotiations down the drain. Some think they're literally too hot to be there, others are afraid of being upstaged by their costars (even if those costars are inanimate objects). We even have an example of an actor turning down a role because no one would tell him how his character poops and pees.
Here are a few more of the most bizarre things that made actors turn down big roles, or actually walk away from acting altogether: