I was recently on a flight, and when we took off, we heard a pop. The pilot came on shortly after and told us not to worry, that it was one of the tires blowing up. He told us not to be alarmed because we had two tires and we could land with one. That was a frontal tire.
Six hours later, when we were landing in Toronto, he told us not to be concerned about it because we had four tires. So I was concerned that he didn't know his aircraft. Does that happen often?