ok, not bike-related, but i was able (or lucky) to get the timing right for this scooter crash a couple of weeks ago...my son was riding on the sidewalk in front of my mom's house, and some nearby tree had roots which pushed up some of the tar...he liked to roll over these, until one time his front wheel got caught and he went crashing to the hard surface. note the pre-existing knee bandage.
a few milliseconds before impact:
the aftermath:
a few milliseconds before impact:
the aftermath: