Post something that ruined your plans, annoyed you in the moment or fir some time, derailed your evil plan, you got outsmarted by your pet or peers, door smacked you on your ass and you got aroused, you went for a walk but sky went medieval on your ass, etc...
Could be a photo you documented the situation with, could be a quick vent, could be a long-winded rant... Making is sound comical is always welcome.