One time I yelled at a group of asshole kids tormenting the hamsters in a pet store. They were dropping them and poking them and generally being little assholes, so I put on my Authority Figure Voice and loudly said "KNOCK IT OFF." They pretended to be little tough guys, saying shit like "whatever, we're just playing" and I shot back with "Would you want someone to do that to you? LEAVE THEM ALONE." One of the employees actually thanked me afterward, because it was what they'd been wanting to do but couldn't.