Grant Holloway is the world champion in the 110 meter hurdles. Watch the fascinating video above in which his head is digitally stabilized. From Kottke:
In this view, you can clearly see how expert hurdlers don't jump their whole bodies over the hurdle (like Super Mario or something) — it's more that they just bring their lower bodies up over the hurdles while their heads & shoulders remain more or less the same height from the ground. There's hardly any lateral motion either — very little wasted energy here.