I feel the exact same way....I figured I would melt like butter when I finally got a crack at my buck, but I wasn't nervous, heartrate wasn't 5000, heck I wasn't even shaking......until the arrow was released. Happened with my Pronghorn and my doe as well.....nothing but calm and collective before and up through the shot. I can't be held reliable for anything I do after it goes down, I really do fall apart. My friend filming me thought I might fall out of the tree one morning after a rut crazed hunt and a deflected arrow on a buck.
BUT, like Rick said, I've never had a giant walk out in front of me either, yet.
