I think I know how you'd ride it but it seems like it would look morally, ethically, and personally wrong.
All kidding aside, I really love the artistry of the human body and its components... that bike is so rad.

IC posted this, and though I usually would never repeat any of the pics he posts *giggle, nudge* this one is well worth it:

The shading and seemingly precise linework really make it, as well as attention to detail and what look like spinal nerves, too. Very nice.
If I can post the tattoo I've seen of the carpals/metacarpals/SLTPTCH/radius/ulna done in UV ink on the backs of someone's hands, I'll post it. It was beautifully done and encouraged me to copy more than I would like to admit.
oh! oh! I found it!

The caption on the site reads: "
This black-light skeleton tattoo is tufneltastically great. It's invisible in normal light, but under black light, everyone gets X-ray spex. "
*drooooollll*
If anyone else is interested in piercing or tattoo pictures (tasteful art only, thanks) I can probably find a few more. I've always seen it as bonsai with the body, with all the intense care and artistry necessary for good results.