i once got caught having phone sex (masterbating) by a college professor ( i was a work-study secretary for the dept) and didnt think anyone was in the building. There was a small window on the office door, apparently he got quite the show
When I went to use the bathroom down the hall he was standing outside the door & said "you're here awefully late this evening, business or pleasure" and gave me this shit eating grin, and my face turned purple and I said "i'm working on a paper for tomorrow" and bolted to the bathroom! lol I scored an A in his class the following semester though ;)