Kill stuff w/o overwhelming the player with stat updates

As requested -- basically just set the health low manually and then go ahead and kill the entity. I should note here that setting the health like this will bypass events being able to block it, but I'm betting there is some mod out there that sets a player's health to Integer.MAX_VALUE as well so this is probably the "best" way to cause death. (And really, do you want a mod blocking this anyway?)