This is a picture from a shirt you can buy that was made to look like a Haynes workshop manual. Except it's for R2 units! Like R2-D2, you know, from Star Wars! The shirt costs $24, and if you look closely at the insides you'll notice that R2 units are packed with a bicycle, turntables, one of those robots from Dr. Who, and a dentist's chair. Who'd have thought? Not me. I may actually get one if I can steal enough money out of my wife's purse without her knowing. My "Level 70 geeks do it all night long with a pack of blood elves on the back of a flying mount" t-shirt is getting pretty ripe from all the late night gaming sessions.
Reece Ward's shirt page on redbubble (with a bunch of other geeky clothing)