This thing relies on jet engines. There are lots of odd machines around the world that use jet engines for strange high-energy tasks (ie speed record attempts)

This thing relies on jet engines. There are lots of odd machines around the world that use jet engines for strange high-energy tasks (ie speed record attempts). Invariably they rely on used aircraft engines that are, for whatever reasons, no longer suitable for flight and would not be financially practical if built using new engines. As they are no longer flying, these engines are likely not serviced appropriately. They are likely just using them until something pops. You wouldn't want to be around an aging jet engine when it decides to give up the ghost. Things get very energetic very quickly.