Yesterday I was at a LAN party at a friend's house, with another friend. We were playing on our own Gmod server, on Bigcity. We were all sitting in his basement. His little brother has his computer in his room upstairs, so he can't really cooperate with us as much as the three of us can. We suddenly noticed that he had joined our server, so we got a crazy idea.
We all changed our playermodels to G-man, painted each other green and added a newspaper material to our bodies. We still have no idea why, but we did it. Then we went up to one of the buildings close to the spawn, so we could overlook the area. We positioned ourselves in a row near the edge so that we were all clearly visible. I spawned a giant prop behind us and ignited it for added effect. When he finally spawned, each of us fired an RPG rocket at him at the exact same time. All the rockets hit him spot-on, and we kept doing it until he left the server. Holy forget, that was fun.