There are some things that you can't explain and my reaction to a tyre burst is the same. Usually when the tyre has a puncture, the air pressure reduces gradually till it is flat but sometime the tyre of a moving vehicle just explodes and that explosion has a very unique sound. It is not a bang but more like a short whistle mixed with a metallic clang. Whenever I hear that sound, I don't know why, but I can't control a fit of laughter. With the JV Link Road just outside my home, I get to hear such sounds quite often too.