I've got three donkeys, and even if I were the kind of scumbag asshole who thinks it's OK to abuse animals, they'd be the last ones I'd mess with. Not only can they fuck you up real bad from either end, they have long memories and are very capable of nursing a grudge for a long, long time. If you hurt them, they'll remember it and come back for revenge at a time and place of their choosing.

The lion may be "the king of the jungle", but the donkey is the king of FAFO.