My foot went through the glass. The sound was surprising, a staccato of hollow ringing. Even more surprising was that when I retrieved my leg, a large triangle of glass came with it, embedded in my calf.
I staggered, reaching out for something to hold on to, but my leg gave way beneath me. As I fell, I saw every mistake I'd ever made, and I had just enough time to register that none of them had been as bad as this one.
THWACK. The pavement tasted salty metallic. I blacked out.