Zipping around underwater while being pulled along by a sort of personal mini sub, sounds like a great way to do your own impersonation of James Bond in Thunderball. Just make sure that your henchmen don't dive deeper than 10 feet, or go faster than 2.2 mph, because those are the performance limits of the Reef Rider. Still, I suppose it beats swimming when you're out snorkeling, and at about $200 I'm sure you'll be spending much less than Q did on Bond's version.

I want one of those, via Coolest Gadgets