When I was learning to drive a clutch, my Dad took me to an empty lot and we practiced until I got it. Why don't these guys practice this stuff before they go to the launch? There is nothing in the world more embarrassing than looking like an idiot while a bunch of people go from amused to annoyed waiting for you to get it right.
Its like trying to parallel park on a busy city street, but worse because you're clogging the whole launch.