This side of Superman isn't talked about enough IMO. We all know about his other qualities. Optimistic, fatherly, compassionate, fun-loving, stern when necessary, selfless. But there's also a slightly less "kosher" aspect of his fun-loving nature that I really enjoy when it's brought out. And that's the trouble-making prankster who likes to get even every so often.
I know in the Golden Age Superman was all about bullying bullies, which is in a similar vein to what I'm talking about, though not every example fits as I'm talking about a kind of joyfulness he has in turning the tables or surprising someone with his powers.
I have a few examples that stick out but want to see what you guys offer first. Who's got some good ones?