A lot can go wrong as an NFL quarterback. There's the footwork as you drop back. Finding the proper arm slot on the release. Moving quickly and cleanly through your progressions. But even the simplest action can be complicated -- often drastically -- by one ever-present factor: the defense.
You'd be surprised how much more difficult even the easiest tasks become when a 6-foot-5, 270-pound defensive end is hurling himself at the small of your back. For NFL QBs, that's just another day at the office. If you want to succeed, you have to put those thoughts aside. Still, some defensive players leave more of an imprint on your psyche than others. Simply put, some guys are just flat-out scarier.
When I was taking snaps, I always hated facing really skilled edge rushers. I wanted to get the ball, get to my launch point and make my reads from there. With those edge rushers bearing down, though, you often get pushed off your spot. You're forced to move, and once that happens, your mechanics suffer and the resulting throws ... well, sometimes I shudder just thinking about them.