The scene was filmed in New York's world-famous Katz's Deli, and the woman who says "I'll have what she's having" after Sally's faked orgasm is director Rob Reiner
's mother. Rob said about the scene: "I actually sat down opposite to Billy and acted it out and showed her what I wanted it to be. And I'm pounding the table and saying, "Yes, yes, yes!" And Billy describes it as having a date with Sebastian Cabot or Victor Buono having eaten Thai food or something like that. And I'm pounding away and having this fake org*sm and my mother is sitting there. So, it was a little bit, uh, nerve wracking for me!"