Server Crash, unknown error.

Recently my server has been plagued by this annoying error that crashes the server.

Crazy physics on [420][prop_physics] [Ang:-1.#IND00,1.#QNAN0,180.000000] [Pos:-1.#IND00,-1.#IND00,1.#QNAN0] - removing

Now the only reason i’m asking for help is because i really can’t work out why this is happening and the error gives almost no real description so please help, any ideas why this is happening and how to fix it?

Holy crap thank you, so nice to know why this is happening.