When viewed backwards...

I didn't mind the Shawshank Redemption, at least what I saw of it. maybe I need to approach The Big Lebowski without the mindset that its "going to be a comedic movie"
 
If you watch "what Happens in Vegas" backwards, Kutcher and Diaz have a great marriage, which gets rocky, and the trip to Vegas ultimately ends it.

A lot of the humor is just subtle and absurd in nature

It's definitely a comedy, but nothing like Billy Madison for example

It gets more funny with repeated viewings.
 
If you watch Saw backwards people heal themselves from gruesome incidents and walk off fine.