When George and Jerry are panicking that Elaine won't show up and how they can avoid dining alone with Mr Benes:
GEORGE: We just tell him we're frightened and that we have to leave!
Yeah that’s good! He’d clunk our heads together like Moe!
I meant to say at the time of this exchange, I remember reading that the plan was for Alton Benes to be a semi-regular character but that idea was axed because everyone on set actually was frightened of Laurence Tierney who played him! I gather he didn't have to travel far from his actual personality to play that character.