Spin Attack 2.0
Description: Link will run toward the edge of a platform then do a rising Up-special whose animation is notably faster than normal while the amount of distance covered is the same. This results in the Up-special finishing before Link has stopped rising.
How to Perform 1: Run toward the edge of a platform, then use U-special at the very edge i.e. later than you would to do a SAF but soon enough so that you don't fall off first. Essentially you are interrupting the initial animation of the grounded up-special before it does anything.
How to Perform 2: Run towards the edge of any platform, Hit Backwards, Instantly Jump then Instantly cancel the jump by using Up-special at the very edge (i.e. as late as possible).
Note: Here's where it gets interesting. The thing is, for the non-custom Up-special, this is actually pretty bad. The hits don't connect very well with each other at all; often you'll end up missing the last few because of it. The hitboxes on the move simply weren't designed to link into each other at this speed. However, for the custom 2 Up-special, this tech actually makes it connect better imo. With the custom 2 Up-special, normally the last hit is made as Link is on his way back down, but sped up with this tech he finishes it at the peak. This is the point where you go, "Oh I see. I get it now. So that's why he called it 'spin attack 2.0'. Very clever." because it's only good for the custom 2 Up-special.