World slalom championship Le Xuan
http://www.youtube.com/watch?v=Z9ydCGrRM8o
Downhill roller
http://www.youtube.com/watch?v=nGfYBFRPmO8
Hilarious derby hit
http://ddstreet.org/vids/beyonslay-vs-ricerocket/
not amazing, but cool: Music video with roller derby
http://www.youtube.com/watch?v=6ido8QTy7xg
also not amazing, but cool: Riedell factory
http://science.discovery.com/videos/how-its-made-roller-skate-assembly.html
Off-road skates
http://www.terrablades.com/