I couldn't tell you circumstances or setting, but at some point, I insulted Brendan Fraser.
I was talking to some people and said something along the lines of, "I know he's supposed to be the next (some actor I forget) but he's just not that hot."
Then, right beside me, Brendan turned around with a sorrowful look in his eyes. "You don't think I'm that attractive?"
I apologized profusely, but he was deeply hurt.