Ah, yes, the "Stupid Trick Cycle" as we called it. It has the 80s-freestyle-trick bars, but is way too flimsy to ever do a handstand on them. The back seattube doesn't even have bearings, just a crappy latex bushing. These things are really cheap, I've seen them retail for $20. Comes in a 20" and 24", the bigger one being much easier for a grownup to ride. These things have vertical head-tubes, unlike many swingbikes, so they don't tilt when they swing. The fact that it's a unicycle too means you can bust infinite wheelies (and, as noted, also makes it different than the traditional swingbike). My favorite is the curb rides you can pull on them. Personally, you should make your own rather than buying this thing.

By the way, don't think you're going to hook a bunch of these up together and make a giant snake bike, it won't work, Cyclecide tried it. The very magic that makes two wheels stand up fades when more wheels are going in more directions.

Rachel and Alexis made a swing tandem, though: