I have posted hundreds of videos on my websites over the years but at last I am now revealing what I think is the funniest one of them all.  It stars two masters of comedic timing: Harvey Korman and Tim Conway.  The skit, "The Dentist Visit,"  took place on the old Carol Burnett Show.

Notice how this skit builds and builds even though it is only three minutes long.  There are no special effects and there is almost no dialog.  Obviously the key to the hilarity is watching Harvey trying to keep a straight face while Tim goes through his antics.

This is priceless and is still (in my humble opinion) the funniest three minutes on the internet.  What do you think?