Sure, they look dumb and innocent enough. But maybe there was something more sinister lurking being all those yucks and chuckles. Were the Three Stooges the first to use torture horror in movies? Here's the evidence. Judge for yourself.
Looks like an inspiration for a fiendish SAW death contraption to me. Just look at the sheer terror on Curly's face.
I think I saw this fiendish device used in The Collector.
And what about this one. Looks like a storyboard scene straight out of Cube!
Finally, I definitely remember seeing this in Hostel. Just look at the malicious glee on Larry's face. I rest my case.