Via Gizmodo, we find this wacky diving bell cum motorcycle. Very Bond:
Scubadooing means you don’t need to wear a mask or a mouthpiece as in diving, and the air tank and diving weights are on the ScubaDoo, not you! You are seated on your ScubaDoo, with your head and shoulders within a clear dome, your air constantly replenished from the Scuba tank, enabling you to breathe normally! Manoeuvrable? You bet! At a rate of 2.5 knots you’re able to ride amongst the spectacular underwater world, or remain stationary while you feed the fish.
Great. All those asshats who race around on their SeaDoos are going to do the same under the water. As the surfer loathes the SeaDoo, the diver will come to hate the ScubaDoo.
DarrenBarefoot.com 
Nah, I think you are safe. At 2.5knots, they aren’t exactly speedy … nor are they as “cheap” as sea-doos. They are pretty cool though. Although I don’t imagine I’d want to use one in False Creek … ewwww.