I know a guy who showed up for a dinner party with a potted plant as a gift to his hosts. After dinner he started to give it a lot of attention, and then began eating the soil out of the pot. Everybody freaked out, but it turned out to be chocolate cake rather than soil. And, in the end, everyone was laughing.

These videos online, on the other hand, that end with the perp telling the angry victim, "It's a prank, bro!", are freaking obnoxious. Yeah, I know it's a prank. You're a dick.