|: sorry I did not know you could use roller skates for aggressive skating. I have never seen that before.
That's probably the case because there are very few vertical roller skaters. But it't not a new sport by any means. There have been vertical roller skaters since there have been half pipes and before that there where roller skaters skating pools and skate parks. Some of them switched to inlines when inline boomed big time. Especially in Europe many of the top vertical roller skaters switched to inline.