Video: what’s wrong with this One-77?

This is all a bit weird. Person drives Aston One-77 in Paris (which is fairly unusual in itself - there are only 77 of ‘em) but somehow manages to stall it.

How did they manage that? It's got a six-speed automated manual gearbox and no clutch pedal. Which, surely, means that's not strictly possible.

The six-speed gearbox it comes with sounds, at least, like a pretty sturdy effort - no surprise considering its 48-valve, 7.3-litre V12 makes 750bhp. It's mounted in the back and has an auto shift manual/select shift manual setup that's governed by an electric hydraulic control system.

Now watch. Any armchair mechanics fancy offering a probable cause?