I lost mine this past weekend. I was heading out on a long ride. About 2 mile from home, I wondered who was throwing firecrackers at me. I felt something hit the back of my leg and started to look around for kids having fun. Very quickly, I realized my back tire had blown out. I managed to unclip and dismount without falling. I proceeded to chage the tire per lbs instructions. I gues I had it kinda easy because the blow out took the tire half way off the rim. Changed everything out and then couldn't close my quick release to keep the tire in place. Talk about frustration.
After bumming a ride home from a friend, I called the lbs for an explanation as to what I was doing wrong. Turns out that I had overtighted the release. It closed easily when I loosened it up. Just something to keep in mind when you're changing out your first flat.
I took the bike and tube into the lbs on Monday. They told me it was the best blow out they'd ever seen. There was an 18" rip in the tube. They also gave me an A+ for my tire changing efforts. I was quite proud of myself.