Put a mark 10" above a door in your house and imagine jumping over that with no mechanical assistance.
My skills at digression are improving. Back to the subject at hand.
Watching the up close slow motion replays from the women's 200 meter hurdles finals was interesting in HD. The force of impact from each stride could be seen in slow mo ripply goodness all the way up to cheekbones and eyelids. ("ahem, my eyes are up here")
No, really. The images reminded me of the old astronaut g force tests in the giant centrifuge thingy that pushes your brain out through your ears.