If it isn't a tiny ninja, at least you'll have a legitimate excuse to call up the Winchesters. And if it is one than his epic battle against Sam and Dean's ankles would totally be worth it.

Hee, yea, zombies are pretty hard to miss with all that crying out for braiinnsss. Unless he happens to be an invisible zombie, in which case you have a very dangerous problem. Or he's like a cat and instantly hides when anyone comes remotely near...