I'm serious, I was playing with a friend on the map and at one moment it was standing in a room with mugs and a table. It looked like a model from the game Half Life 2 (that is, just the dark texture of Gordon Freeman from the first part) and just stood in place. Tell me, what could it be?
(Edited) Its a bug. thx Captainszasz for answer *Sometimes semper (gray gordon freeman) spawns when someone joins your game. It's a bug that's been in the game for awhile*