In the scene where James is striping for Nadia look when he throws his shirt on the web-cam. When Finch and that other guy are watching the shirt falls off. If you pause it and go frame by frame you can see a hand pull it off.
Also, the shirt is not hanging off of the web camera, it is fully on the camera. It can't full off on it's own, and even if someone would have pulled it off, the camera must have been stuck down and web cameras aren't stuck down.
I agree with the slip up, but to whoever said web cams aren't stuck down... yours might not be, it doesn't mean other people won't stick their's down! I do because I don't want it to fall over and break!!!