Re: why does peyton manning yell "hurry hurry" before every snap?
It's just about having a cadence. It can vary snap-to-snap or be exactly the same five consecutive snaps and then change slightly to keep the defense on its toes. Every QB does it differently, but Manning seems to be very good with his cadence, as he is with everything else related to being a QB in the NFL.
Remember two years ago when everyone thought his career was over? Yeah.