I can't play cause my screen looks like this when i play the mod is classic heres a screenie and it happened when I went on mp

Hmmm...that's new
I've seen hands and wrists glitch but not all of the joints...

That's interesting...
Have you tried going to options -> mod and deleting all text there?
If that hasn't worked, I suggest you reinstall...

I forgot to say It fixed when I restarted my comp

reinstall if that doesn't work the its your computer

that almost looks like the transformer mod,

its a mod, unload it.

Type:
/set default single

And then start a new game.