I'm still torn for my number five spot.

There's the movie with all the senseless rabbit violence:



And there's the one with the senseless robot violence:



Also, Richard Adams wrote another book called Plague Dogs. While a little long-winded compared to Watership, there was an animated movie.

Remember, kids, mind the 'safety' button on your shotgun...



"You're either lying or stupid."
"I'm stupid! I'm stupid!"
Megatron and Starscream