While Indiana and Elsa are in the tunnels under the Church\Library, Indiana finds an X on the wall. He asks Elsa to move back because he is going to break through the rock wall. When the shot goes back to him, the wall is already partially broken. Poor Indiana isn't as strong as he appears to be. Also, watch his head as he breaks through, he bangs his forehead on the top of the rock, and doesn't even flinch.