You follow the sounds of skittering and scratching to a spot at the edge of the Tavern's cellar, where the source of the plague of rats immediately becomes apparent:
Somebody left the rat faucet on. How careless!
You close the valve. The torrent of rats slows to a trickle of rats, then finally to no rats at all. You should probably go tell Bart you've fixed his rat problem.
Someone else do the technical stuff; I ain't too good. Guywithpasta 04:22, 23 October 2010 (UTC)