Minecraft wiki entry for Rabbit, associated text: If the killer bunny finds any player within a 16-block radius, it hops toward the player much faster than a normal rabbit. It moves in a style similar to that of a spider. Once it closes in, it jumps at the player, dealing 8 damage on Normal difficulty. If the player strikes at the killer bunny, it runs away for a brief moment, then returns to lunging at the player. Killer bunnies are immune to the Thorns enchantment.