Susan SarandonSusan Sarandon made a surprise appearance Tuesday evening at indie rock band Of Montreal's concert in New York City. While celebs in attendance at concerts tend to fade into the background of roped-off VIP sections, Sarandon surprised everyone at Highline Ballroom by taking the stage and proceeding to sternly spank two naughty pigs (well, men dressed in pig costumes) with a ruler.

Forward to the :35 mark to see her in action: