I'll have to go back and view it again, but I know the person driving the
M6 and am sure he was using the "S6" mode. In S6 the shifts are almost
violent (you can see the camera jerk each time he shifts) and they occur
extreemly fast .... something like 50 milliseconds or something. You keep
your right foot to the floor and there is no drop in engine RPM until the
next gear engages. You might have been seeing the car hitting the rev
limiter a couple of times that will drop the RPM off slightly.
This occurs at 8,250 RPM and it is hard not to hit it in 2nd or 3rd
because the car is accellerating so fast.


I'm not surprised that the car has such a shift mode, but your description
and what I heard don't quite match. Watch it again, paying attention to the
sound of the shifts and tell me what you hear.