Happens often enough that there's now a warning sticker on most new copiers telling you to not sit on them.
What kills me is .... he keeps looking around to see if the coast is clear. I mean ... jeez .... ok, maybe the camera wasn't totally obvious ... maybe. But, fer Christ's sake .... if someone does come in??? Even if you did manage to get off and pull your pants back up and not be still tucking your shirt in or something equally obvious .... your assprint is on the glass .... and there's a copy of your ass in the output tray. And most output trays are face up.
And even then ..... even if you get away with it .....so what??? What possible reason could someone want a photocopy of their own fat ass? What are you gonna do with it? Keep it for posterity? Mail copies to your friends?
And if you don't? What was worth the risk of loosing your job? You've got your pants down in the copier room. If you were in there with someone from the steno pool ... I could see that. But in there alone?