So if you multiply torque (in pound-feet) by engine speed (in RPM) and divide the product by 5,252, RPM is converted to radians per second and you can get from torque to horsepower -- from pound-feet to foot-pounds per second..
Did it explode? Nope! You can still see it flying. Then what was that sound? It was a sonic boom. A sonic boom is a loud sound kind of like an explosion. It's caused by shock waves created by any object that travels through the air faster than the speed of sound. Sonic booms create huge amounts of sound energy. When an object moves through the air, it makes pressure waves in front of and behind it.
That sudden breaking of the foam rubber is the earthquake. That's just what happens along a strike-slip fault. Earthquake-like seismic waves can also be caused by explosions underground. These explosions may be set off to break rock while making tunnels for roads, railroads, subways, or mines. These explosions, however, don't cause very strong seismic waves.