Originally Posted by Franc Rauscher

Thank you.

My explanation would have been similar. As the throttle backed off, the injectors shut down. System went lean and the ECM shut it down. Or the engine starved. Given the over the ground speed, the ECU said abort.

Same thing could happen to a totaly mehanical carbuerated engine.

One other possibility would be an over rev situation where he pushed in on the clutch, left his other foot on the throttle, the engine over rev'd to the limiter, and the engine shut down. Depending on what the driver did with the throttle it stayed that way.