Shockwave Jet Truck - powered by a 3 x J34-48 jet engines each 4,900 lbf with afterburner - a regular "padding out the program" civilian addition at military air shows over here in the USA - has exploded during the Michigan Air Show killing the driver.
The J34 was obsolescent almost as soon as it appeared in 1947 and was latterly used to augment power on the P-2 Neptune.
Shockwave was capable of 376 mph consuming fuel at over 400 US gallons per mile.