I took some video with my iPod Nano during my barefoot run today, again, just playing around with it for now. I actually encountered some glass on the road, which you can see around the 40 second mark on the left side. I found it amusing as it's the first thing people ask about regarding barefoot running, but is, in fact, rarely encountered. You'll see my left foot land to the right of a crushed piece. The video below is in slow motion - just the part where I encounter the glass.