I think you have to admire the work, even if it is utterly pointless. After all, the entire throttle system would have to be designed from scratch, god knows what kind of brakes it'll need since there shouldn't be much mechanical braking.
My biggest worries are for people around him. If that bonnet is 270 degrees C, what happens if you need to open it? Or, worst case, if you run into someone or something. The heat of the metal plus the jet firing out the top would melt everything around it and potentially ignite the already-highly-dangerous jet fuel.