wow... as an aggressive rollerblader, i am quite impressed... 'skitching', as holding onto cars is commonly called, is quite difficult... at 35 mph, you feel like you're just blazin', and after a while it gets harder to just hold on... then again, i've never done it with a motorcycle, just with a car...
also, those are no ordinary rollerblades... aggressives skate boots i believe could hold up, but i don't think the bearings, nor the wheels, nor the frames would last at that speed...
again... wow.
-iotone