I am pretty new to this, and when I bought my bike the salesman at the bike shop told me to buy a couple of tubes and keep one of them in my little pouchy doohickey when I went to ride. Needless to say...I didn't pay attention, and today I got a flat. When I was ten miles from home. So, I had to call my dad to come get me. I felt like I was 12 again. I have now learned my lesson and will keep a tube on me at all times. Is this the normal learning process?