Normally, a season-ending shoulder injury to your starting quarterback can open up all kinds of doors to uncertainty. When your team brings in a highly-skilled and respected quarterback in the interim, it can make things doubly worse.
The main thing for V.A. to learn as he matures is how to calm the heck down. The strange “hands pushing down” thing indicates that he is on edge. That needs to go. Having said that…great signing. Let’s go Als