I have a question. Or two. Does the ECU know that you are in 'start' mode if the key is left in the run position? In start mode I assume the air/fuel ratio is modified. If the battery is dead forget it. The alternator will not help you, you will have no fuel pump and so on. But I think the actual question is a situation where the battery is too low to spin the starter. Since there is no clutch pedal, the normal way to decouple the starting motor on a push start, do you move the lever to neutral? How fast is that process? I suspect that is also an electric motor to make that change. As for raw fuel, this does not appear much different than the cylinder discharge in a situation where the car will not start because of a wet ignition. This is speculation on my part and I hope to learn more.