So funny... the comedy group "Improv Everywhere" had 20 women visit Katz's Deli in New York where the "famous fake orgasm scene" in "When Harry Met Sally" was filmed. Here is the hilarious video.

They all reenacted the scene simultaneously, and carried on for more than a minute. The first lady starts at :30 seconds, and the others join in at the :55 second mark... enjoy!