The grateful kitten inadvertently activated the police cruiser's siren.
UPDATE: Love cats? Feeling generous? A page has been set up allowing you to donate any sum you want to help Erran Frazier fix his truck, which, as you'll read below, he had to cut into his own truck to save a trapped kitten. Feel free to donate to the cause here, and note that the donations have already succeeded the asked-for amount.