Continuity mistake: During the wedding scene, we see Mutt taking photos with a 1950s Kodak Brownie box camera. When wind blows Indy's fedora off the hat rack and up the aisle, Mutt stoops to pick up the hat, with the camera no longer in his hands. Indy snatches the hat away from Mutt as he passes, and the shot then cuts to a full view of all the wedding guests leaving the church, with Mutt in the center of the shot, still standing in the aisle the whole time. He takes out a comb and passes it through his hair, then picks up his jacket from the pew before he leaves, but the boxy Brownie camera is still nowhere to be seen. It's not in his pockets, and it's not in his jacket (the angular bulge would be more than noticeable).