This was an amusing exchange. If you are that worried about frames breaking you better inspect your bike after every ride and inspect every person's bike you come in contact with to help them out and keep them safe. I am pretty nice to my bikes so I don't expect any failures any time soon, but its a good idea to inspect them every once in a while. The only thing that really failed catastrophically when I was riding it was the steel handlebar on a Sears mountain bike at the camp I used to go to as a kid. I was trying to get some air on a hill and pulled up on the handlebar. It snapped off between the brake lever and the stem. I was fine and I apologized for breaking it, but nobody seemed to care too much. Its amazing those bikes lasted as long as they did.