Twilight Zone: The Movie is known mainly for a terrible set tragedy, but also features the scariest bunny on film. Watch the scene below.
Donnie Darko's time traveling emo-film features a dead man in a suit dressed like one messed up rabbit. Once you've seen Frank, it's hard not to unsee him... ever again.
In Alice in Wonderland, a children's fable, you expect that tea service would be a pleasant affair, but then you end up sitting across from a deranged rabbit. You know it's got teeth, claws, and can hop faster than you can run, so you hope it's last marble won't be lost today.
And if this is not enough bad bunnies, check out the awesome 30-Second Bunnies Theatre that Angry Alien Productions and FearNet put together last year.