Def Marc Summers as well...I have a 1987 ep where a contestant thought that inventor OA North came up w/"the boogie man", and he launched into that TM laugh before humorously pondering who really did invent the boogie man.
Richard Dawson's another one, the September incident being a prime example...he actually did it again, near the end of the network run, though this contestant's response was far less funny, IMO...
When you meet a stranger, name something you might talk about: Mutual friends.
Chuck Donegan (The Illustrious "Chuckie Baby")