I was at practice last night and was focused on Dez that particular play. I have no idea what Aaron was doing but the throw wasn't even near Dez and then the two of them just collided head-on at full speed.
I was sitting with AussieW and we had been watching Aaron before the play. We both noticed he had seemed a little off, in the little action he got before that and then his interactions with others when not playing. Just before the play he got injured on, he and Tyrod had a little meeting about 20 yards behind everyone else - just the 2 of them.
I may have to stop going to practices. The one I went to last year was the one McCoy got hurt in.