When Damon and Affleck finally arrive at the church, Affleck preaches to the crowd and then rips his shirt open to reveal his angel chest underneath. Then there is a close-up of Affleck turning to Damon and making a comment. During this close-up, if you look at Affleck's shirt, it is no longer torn open.
yeah i know i noticed that too! It's funny, cuz he rips his shirt open and says something, then turns to Loki, and is all, "DO IT!!!" trying to be heck of macho and stuff, and his shirts still in one piece...haha thats hell of funny....