I went in to get a flat fixed, because I'm a mechanical moron. I offered Curtis ten dollars if he'd go slow, and teach me how to do it for myself. He refused the extra money, but was a terrific teacher. He and one of his employees gave me lots of tips for bicycle maintenance. They were wonderful. I bought a patch kit for $3.50, in addition to all that they showed me.
On my way home that night, I got a nail stuck in my tire. Thanks to Curtis, I was able to patch the tire myself, saving me another couple days of frustration. I will never go anywhere else.