My fave hilariously bad moment
Yes I know, there are a lot to choose from, but this always makes me laugh: About 35 minutes in Father Kovak tells Arnold that "I'm sure that you can find your way out." Then he opens the cellar door (which leads to their secret stigmata research center) and closes it. So what does Arnold do? He turns the door handle and it opens.
I guess it's a sin for churches to have locks on their doors.