It must be because I read Denver's thread about two flats on one ride. Yesterday I got a flat. The old tube was in pretty bad shape. I pulled out the spare tube I carry and while unscrewing the top/head, it snapped off. (See photo with line for the part I'm talking about). I didn't pull it off/out. I could see where the metal actually sheared. Has anyone else had this happen? It was a brand new tube (purchased this spring). So, out comes the patch kit and wouldn't you know it the glue tube is dry. Lucky for me I had a single Park patch lying in the bottom of the bag.