Right then, let me throw another one in that contributed to a loss of brain cells. This was in Cortex Roleplay on Starcraft 2, a roleplaying engine where you can take any asset from the game (and sometimes more) and throw something together to make your characters/setting for the roleplay. Most commonly, people are in "pubs" - 6-8 people randomly drop in, launch the game and start creating their own things that are then mashed together into a roleplay. I've had surprisingly good success with that, but one time stands out to me as being really special.

There was a guy in a desert map who spawned some 200 moving ships in the north side of the desert. These were fantasy wooden boats that sailed on sands and roads. The rest of the roleplay was a sci-fi wasteland, but this guy was sitting on the top of the map with boats and derping his way through the desert. He wasn't roleplaying, or at the least, wasn't interacting, and set himself as hostile to all other players. It was all very strange. He then got mad at me when I, as the GM, nuked his garbage after telling him to get his act together.