This one is (literally) jet-powered:

Powered by General Electric J-79 jet engine straight out of a F4 Phantom fighter jet, the big yellow school bus, which is the largest jet vehicle, does excitingly fast 350mph. This 42,000 hp, 10-foot-high, 35-foot-long bus blasts a 75-foot flame out its exhaust...

The bus driver, who wears a seven-layer Kevlar suit while operating this vehicle, has prior experience driving a jet-powered portable toilet.

Link.