I gotta say, if this ever happens to me I would:
A) Think I've suddenly became famous from my brief stint with 'Law and Order: Criminal Intent' and am the next subject of Ashton Kutcher's revived "Punk'd".
B) Run really, really, fast.
C) Blame the nearest art appreciator for pushing me.
D) Proclaim I'm Robert Langdon and the secrets of what really sank the Titanic was hidden behind the painting.