Mark Frauenfelder: The Navy's Safety Center website has a fantastic gallery of photos showing people doing foolishly dangerous things. On the plus side, he is wearing a hard hat. Also, if you look carefully at the boulder’s 4 o’clock, you’ll see a plastic drink bottle propped on another rock, so he is also staying hydrated. And maybe that boulder is actually 20 feet long, so that’s just the tip sticking out. Yeah, that’s it. Link (Thanks, Shawn!)