I have encountered players using some sort of wall hacks to see through buildings. I entered the bottom of the piano house and walked up the stairs pointing my gun and came across a player standing on the railing with his head glitched through the roof. I eliminated the player, and reloaded my weapon. I heard more movement inside the house, so I moved up to the top of the stairs aiming my weapon, and out of no where a player with a KA-M, popped out of the wall on my left to shoot at me. The player eliminated me of course, because I had no chance. I have video proof of the incident along with the names of the players who are using the exploits.