I compare it to being in a car accident. There's so much adrenaline rushing through you that you remember being in the accident but you don't remember any of the details.
The actual cheerleaders in our film are all Broadway dancers.
The other girls were so comfortable with their bodies and it eventually rubbed off on me.
Simple formula for the actor: prove you're creative enough to get the job, sane enough to keep the job, and hungry enough to give up everything else to keep them happy.