28. Cut the science lesson from Indy in the quicksand.

I think it was funny.

It's not a scary scene after all. The purpose was to make a (kind of...) character developement scene out of a dangerous situation. That was the spirit of this comic scene.

If you delete all the comic relief of the quicksand scene, well, it will be just a very average scene, cause there's no real tension behind all of this. It was not the purpose.

Other than that there are great ideas in your list! Quite interesting.