There is a considerable upslope off S2 into the ramp (see video) and he appeared to be nose high staring into the lights with little or no visibility under the nose and snow covered taxiway markings. Probably had a handful of thrust to get up the slope and the aircraft ran away with them .... if it was 12 knots it would be way too fast under these conditions. Nose wheel might have had little traction with snow and coming off slope and abrupt or excessive tiller would easily have lost any traction that it did have. Body gear activation would have made it worse. Park brake set and tow truck might have been a good option. Easy to say after the event.
Last edited by offa; 29th Jan 2022 at 15:40.