I was intrigued to find out about the level removed from Crash Bandicoot that others had been talking about in this topic, "Stormy Ascent". Here is a video of a playthrough:
Now... I don't actually think it seems as difficult as Slippery Climb. I mean here's what someone on Crash Mania has to say about it:
Well, you remember Slippery Climb, right? It's one of the toughest levels in the game. Compared to this level, Slippery Climb is but a mere tutorial. Stormy Ascent is the hardest level in the game, and quite possibly the entire series.
I have to say I disagree... Some of the points of Slippery Climb are simply fiendish (hopping from a set of platforms moving in a circular motion to one that is moving in an irregular motion; jumping from an oribiting platform to an inset containing some boxes, then having to jump out). Nothing of this level struck me as THAT bad.