This one time, I was buying some candies at a 7-11 in Vancouver and there were a few bums camped out near the entrance of the 7-11 who pestered me as I went in the store. I was second in line to pay, and the guy in front of me was a 6'4" fully uniformed RCMP officer and I made small talk with him.
I told him, "see those bums outside there, they threatened me". After the cop paid for his items, he went outside the store and started yelling at the bums and then the cop looked back and winked at me.
That made my day!