Radi0n said:

Well, yes, that's exactly it. The point where he turns his head to see the falcon (not snowspeeder). I know you already fixed that point where he turns his head, but he seems to be turning it "inhumanely fast", don't you? His head turns too fast, way too fast, for it to be normal, even if it is just to queue it in time with the falcon turning round.

Or is that just me?

Yep, just you, i'm afraid. ;) There hasn't been any speeding up added to the clip or the original. Looks perfectly natural to me.