weird gmod virus/glitch

This happened to me before i recorded this vid, i wanted to see if it would happen again

[@alobx1]

check that black room

[@luigiplushworld]

What

[@Doomdoom876]

wat mod did u download before this

[@somerandomperson4488]

I dont think this an actual virus. the channel seems to be a gmod arg

[@Doomdoom876]

@@somerandomperson4488ohhh dam