This may have been discussed before but it seems to me that the producers of WML must have given Hal Block a clue as to the line of questioning he could use with certain guests that would make the audience laugh (not that the producers told him the actual line beforehand). I believe the producers also did this when Steve Allen was on the show. Block even looks at the audience as frequently as S. Allen did (not that it means anything, though). It seems to me that some of Block's questions are really strange and the reason maybe what I wrote above. Of course, all this maybe obvious to everyone.
Edited 3 total times.