Found another, as she went to turn..right after this she tripped..as the baby was coming out of the egg more..trying to avoid stepping on him. Look under wing in the second shot, you can see part of baby there.
Stills were not fast enough to capture the step and trip. but you can see egg part open in the one shot I got, I saw more of baby than that when she fell over tho.
Someone posted an interesting link on Kate's blog to this paper that discusses Brood Reduction by Infanticide in Peregrine Falcons. Might be good to keep for future reference as well, worth a read.