My sweet husband changed a flat for me (against my will, as we were "in a hurry" and I'm "so slow and too careful" when I change them). He managed to get me a pinch flat which exploded right by my ear as I was putting the rear wheel back on my bike... as we were both standing in our mini-kitchen. It sounded like a gunshot. Once my head stopped buzzing, I calmly said: I think I will change it now, do you mind?