Mouse Toy

Cats are spring-loaded.  Perhaps not as hair-triggered as grasshoppers or tree frogs, but you best be sure that the safety is on when you dangle anything in front of them.  I've never tried this experiment (owing to too many antiquities laws and a healthy respect for metaphysical and scientific taboos), but I'm fairly certain that if you dangled a mummified mouse in front of a mummified cat you'd get a response.