Nice one Spanners.
It was not uncommon to have to do the pushback then clamber on board at some ports in the "good old days" where there was no maintenance staff (at least none that could be trusted or could speak English) and a ground engineer was carried to do the turnaround. It was standard practice at SHA for several years before CX/KA found a ground engineer prepared to live there. After pushback with the Tristar you had to disconnect the towbar then climb on top of the tractor and get into the avionics bay which was fwd of the nose gear then into the cockpit. On the 747 you climbed up the back of the nose gear using the tyres and steering cylinders as steps and into the avionics bay, then into the first class cabin which startled the pax a bit. You had loosen the carpet first or you couldn't open the cabin floor hatch. Did a couple of more civilised Tristar pushbacks where some kind soul pushed some maintenance steps out with the aircraft so I could enter via the galley door. Ahhh, the "good" old days.