Thanks, I hear you, but this happens at so many airports when I'm operating the BE60 Duke ... and it's ALWAYS from the moment pushback movement starts, til the moment the pushback movement stops - so I'm at a loss to work that one out. So, to me, it doesn't really seem related to what you're saying - and sometimes the driver stays at the same level and simply moves backwards out of the tractor, other times (less often) the drive moves upwards out of the the tractor.