That's a cool looking contraption!
I like the really big ones that they rent at the beach. Some of them seat 8 people!
Anyone remember Swingbikes? One of the Osmonds used to do the ads for them.
A friend of mine had one and I still want one!
Here's a pic:
http://members.optusnet.com.au/~cwbentley/mypic50.jpg
Bill