I believe its called an orbit when that happens. The real trick is to get it to work with 2 diabolos that are the same.
I was thinking about coming to this EPCC thing, although I'm only interested in Diabolos, not really the other juggling stuff, so I’m not sure if its worth the drive (and I’m only 16 so I’d need someone to take me and wait around all day). The thing is, none of my friends do diabolo, but I think I might be able to try it out in a shop in town.
I'm not just saying this because I'm running the convention but if you ask anyone it's worth coming to a convention.
I imagine (not that I'm gonna try it) it would be like mini columns or more like ping pong. As the one flies over the top, pop the other one up just a lil and let the other travel under it. I can't do mini columns, so this is beyond me. Though others are much more versed in it. Norbi did a whole video full of columns.Chiok