Falling asleep at the wheel isn't fun, kids. It's one thing to do it at 10mph on a recumbent, but it could have been seriously nasty on an upright bike, or worse - a car.
As far as I can work out, these were caused by the handlebar, either during the sudden impact when the kerb (actually a raised verge) grabbed the wheel and sharply applied full right lock, or as I went into ejector-seat mode while the bike decelerated below me. Possibly both.
I also bashed my left elbow (as usual), and got covered in nettle rash.