Example of a situation I found humorous:
[Black & White (a computer game where you are a god)] I once found a way to use the villagers of an opposing deity as flaming bullets of doom on another god's village. Using them I lit their food stores on fire, and they starved as I continued to shoot screaming burning bodies at their malnourished corpses.
Note: in real life this would be horrifying, but the act of what I just described make me laugh. I like twisted humor.