Some minge who's steam ID is Tio was vandalizing the town, while there were no admins online. I arrested him, and he started talking about how he was going to crash the server. Obviously, I didn't believe him, so I mocked him a bit. He then said that it was some kind of bug, and would crash Gmod.
After fucking with him for a bit, I heard him take out a tool gun and start shooting with it. This made a few building turn black and actually crashed Gmod for me, and a few others. When I reconnected, OMG ZombiePenguin said that his Gmod didn't crash.
Just thought I'd let you guys know, in case someone on the server doesn't tell you.