The bit where they launched themselves from that holder thing (please excuse all the technical terminology, you can tell i'm a real racer after my first ever TT ) and did the short sprint. They were all wearing straps and not clipless. Is that the regs or is it just a more failsafe method?
Many are clipless plus straps (i.e. fixed in somewhere) as once the straps were undone, you could hear them unclip as well. Although I did spot a pair of old Dura Ace toe-clipped pedals (like what I had on my bike many moons ago - I am sad). It's usually the monster sprinters that go fully strapped in...
as fossy said, track riders normally have both as the shear power these guys put through the pedals is imense and clipless or clips alone can sometimes faulter. If you watch when they finish they actually have to be caught before they hit the floor
