Option 20

If three hundred mice had gotten out of their cages, I would release all the cats and several lizards to eat the mice. The whole shop would be a giant bloody mess and if a customer walks in they would either scream or take a look in look somewhat like this -_- and walk out. I would be standing there behind the counter playing god controlling the masses lives and realeasing the predators to seek out those that can't survive. All while laughing maniacally.