Spawning in ground

My friend attempted to play a game of HL2RP with me, only to find that after creating a character and loading it his first-person POV camera would appear underground. When he crouched, his POV raises. He is also unable to see player models and my Physics Gun beams appear underground as well. He says it isn’t the first time this has happened, and it has in fact happened on his other computer on another gamemode. He’s currently reinstalling it. This happened on a nearly vanilla Gmod, by the way.

NOTE: It works fine in singleplayer. It ONLY HAPPENS in multiplayer.

I’ve had this same issue, have him delete Addons he just installed, or do a fresh install

[editline]30th June 2011[/editline]

Or it be something in his, lua/autorun/client