cats

There is nothing more cat than hanging out, getting cuddles, and then running like hell at the first sign of danger.

They say that an ordnance tech at a dead run outranks everyone else, but I'd say a cat making a bee-line for shelter probably outranks them if you want to remain in the same number of pieces. Cats have good hearing and the nous to associate a stimulus with bad things happening and to get away in time.