I'm not exactly sure how you do this trick.

I think it was created by pike, its basically a index around but its palmdown and the finger is curled to keep the pen from falling out. The spin is created with hand motion, not finger. Your finger position stays pretty stationary. It was created in the vault of UPSB V2 for the trick of the week. I don't know if I'm allowed to post a vid because it was in the vault, and secret access kind of thing.

So is this the starting position? And then you just move your hand down and let the pen spin around your finger?

You'll want fingers 2, 3 and 4 to be pointing straight. It's much easier to have the pen rotate around the Index underneath the other fingers. It's an Indexaround starting and ending with just the Index finger, palm down.

There was a vid during the UPSB Tack-On Game of a vertical Anti-Gravity, done by L£_Pµb. Doing it vertically pretty much defeats the purpose of calling it anti-gravity. :P

I still don't understand the starting position. Does the pen spin in the direction of a normal indexaround or a reverse?

Anti-Gravity Normal

Ah, now I understand the trick. Thanks sketching.