lol, that would be interesting, logistically painful, but interesting. Best I can do is a motorcycle at 45 mph on the highway. Not very adventurous. Of course, the rollerblade thing does have the possiblity of being humorous...
I don't know how easy it would be to find by now, but there was around 1976 (on video much later, of course) a movie entitled ROLLERBABIES, about the evolution of a game show of the future -- sex on high-speed rollerskates, with points for velocity, poise, and finishing together. Lot of fun.