Seriously - That nice smooth downward motion, and done. I've been looking for metal bowls for making omelets, and they all seem to have a big sideways lip on them, requiring a sideways motion to crack the egg, and that doesn't work very well.
Argh.
Argh - I got really good at cracking eggs during a stint of KP while on profile during basic training - I could do both hands, and I kept the cooks well supplied.