Don't Worry, Be Happy
Walking into the library a lady in front of me opened the door and paused at the waist-level bar that you pass through when you enter. She turned to me asking, how do I do this? I answered gently, you just walk through, and demonstrated. She laughed and thanked me explaining how she thought she had to do something for it to let her through. I smiled and told her it was ok as we parted. It felt very metaphoric.