>>274893007
I thought it's the climbing, but now I think it's the micro-stutter and disconnect from your QWOP arms causing it. 
I'd have to play Overload and bump against the walls like a retard and probably spin in circles on my office chair to feel as bad as Boneworks makes me after a couple levels. It's like I'm getting my VR-legs back and have to end every session with a massive deuce (VR works like a laxative for me sometimes).