Here's one from "The Hollywood Squares" that I just got in a trade, I hope it counts because it doesn't involve game play:
Peter Marshall: Mary, your series is called Brothers and Sisters, and it's on another network--what night are you on, dear?
Mary Crosby: It's on Friday, on NBC.
Peter Marshall: Oh, it's on NBC?
Mary Crosby: Yes!
Peter Marshall: ...It's on NBC, that's probably why I didn't know about it! (laughs nervously) Just kidding, Freddy!
I had to watch that one two more times, I just about died.
The other famous moment from TPiR: the woman who fainted when she won her showcase. I actually saw that one the day it first aired.
Joe (? pardon my memory) Trela winning the top prize on "Millionaire." Carpenter whizzed right through his but Trela sweated bullets.
The guy on "Greed" who answered the question "Which of the following shows were not hosted by Chuck Woolery?" with something like "I've been following your career for some time and I'm sure it's not 'Wheel of Fortune.'" Ouch, it's like watching a train wreck.
The one we saw at the beginning of GSN's "50 Greatest," the woman who won the $25,000 on "Treasure Hunt." Even the producers thought that was worth seeing again.
Once on "Match Game" the rest of the panel appeared to get fed up with guest celeb Mary Ann Mobley. During a question in which the "definitive answer" was "Fanny," Gene looks at the former Miss America and says "OK Mary Ann, show us your fanny!" Then Brett (God love her) pipes in with something like "Go ahead dear, you've already shown it to everyone else!"