Sometime ago I came upon a young boy walking his bike, head down, looking bummed out. I stopped and learned he had 5-10miles to walk and his dad was going to be really, really mad. I told him I could probably fix it and he said, "no, it's flat". I got him to agree to let me try and of course it was no big issue and I had it fixed in short order. He was jubilant. He had no idea such an amazing thing was even possible. I chuckled inwardly at his absolute astonishment that he was going to be able ride home. Best repair job I've ever done.