* The first appearance of the flying war machines can be this, if one person knows what's coming, and the other one doesn't.
* Getting somehow wrapped up in the other player's scarf. It will happen and you will find it funny.
* If you don't know how to do it yourself, seeing another player trip and land flat on their face can be pretty amusing.
* Pushing your partner around. Especially if they're meditating, meaning the player probably went away for a bit and will come back to find themself in a completely different place.
* [[http://www.youtube.com/watch?v=MqXHDdwI2ug Rocket Death Match DLC]] [[AprilFools Teaser]].