Ever so slightly off topic but slightly relevant....
I work for a company that builds busses (real big ones not 7 & 8 seaters)
Anyway, just last week we got our first double decker running with a hybrid powertrain system. It goes like a car when unladen and even when loaded to 18 Tonnes it's still a flyer. The acceleration is absolutely astounding. I'm not sure how the Toyota system works but on this bus it has 600Nm of torque available from standstill. There was a throttle fault on it and I was sitting in the driver seat with my foot hard on the brake and it spun the left hand wheels against the brakes and left a rubber streak on the floor 2 metres long. Filled the workshop completely with smoke!