From what I can tell this is from a Canadian show called "Just For Laughs".

John Pinettes First appearance on Just for laughs back in the 80's, sorry about the quality, but it's the only full-clip I could find.

Clip from Just for laughs

"It's Free 'illy!"

thank goodness this prank didn't backfire...

And stay tuned for next week's episode: A baby in the garbage.

Controversial comedian Mike Ward, doing stand-up at the 2008 Just For Laughs Festival in Montreal. Would this go on the Kids sift? I think not.

Mitchell Hedberg (February 24, 1968 -- March 29, 2005) was an American stand-up comedian known for his stylistic elocution and routines that often consisted of a string of one-line non sequiturs.

John Cleese at Just for Laughs in Montreal doing Cleese Idol, a spoof of American Idol. Ben Mulroney, who hosts Canadian Idol, helps host Cleese Idol.

Great little hidden camera sketch :)

Guy has people hold a video camera, then walks away -- shenanigans unfold.

Oh, the horror! Look'it their faces. Smiles suit them much better.