Headbutt killed mob, but no experience granted.

This is a rare and probably inconsequential feature unworthy of your time, but it made me laugh. While fighting a dolphin (mob), it headbutted me, and the damage it took from the headbutt killed the dolphin. I didn't receive any experience for the kill. You parry a dolphin's bite. You parry a dolphin's bite. Using his head, a dolphin sends you a powerful blow! A dolphin's headbutt scratches you. A dolphin's headbutt decimates him! A dolphin is DEAD!! <273hp 145m 749mv 11680tnl)> laugh You laugh heartily.