I wish they would have shown what was under the hood. I am curious how they vent the exhaust. Even if it's just a micro-turbine, you would think the exhaust would be significantly hotter and under more pressure than a combustion engine.
General Dynamics did a lot of research and engineering on engine stability when it (and Chrysler) was engineering the M1. Perhaps some of those principles would apply to a much smaller turbine.
Probably higher pressure, but I doubt it is any hotter than an IC engine. You are burning a hydrocarbon fuel either way.