do you ever get credit card offers? save the cards and use them to kill the mice. You just hold it by the tail against a table, push down with the credit card and pull up on its tail. MUCH less painful way to die. also quicker and less bloody, which may be a bad thing if your snake likes it that much. Just be sure to hold the tail fairly close to the animal's rump, not bu the tip, they will break their tails and squeal in a very disturbing manner
I would MUCH rather have my neck snapped than be smacked into a wall hard enough to kill me... just for those of you planning to off me, heh...
just a bit more humane, and the clean up is much easier since they do not pee and poop or bleed all over for the most part.
good luck!