For me, the two times in my life that I've laughed the hardest at a pre-recorded piece of comedy were in the movies:

- Black knight steadily losing limbs in "Holy Grail".

- Bernie hitting the buoys while being towed behind the speedboat in "Weekend at Bernies".

For standup/sketch comedy, nothing beat the Robin Williams and Rick Overton improv I saw in person a few years ago. But that wasn't a sketch, so doesn't fall into the same category as the WOF bit.