I tried both e brake and hold. Hold does not work on a moving car, e brake does however. It jolts the car to a very harsh stop. I tried this on a Honda.
I also tried e brake at 10 on my A3 and the rear locked and for a mili second then let go and all kinds of warnings poped up on the dash (pre sense fault, stability off, abs... The full Christmas tree). It cleared up after 30 seconds. I didn't have brake hold in mine so couldn't try that. Felt all sorts of wrong but I did it for science.
Maybe owner was aiming for brake hold but hit e-brake instead. If the tires lock at 120, momentum can indeed do that to a car. Also saw a top gear video on YouTube where they try it on a golf at 120, it slowly comes to a stop.