Maybe a bit off topic, or at least the flow of it, but one of the niceties of the Ground Manoeuvering cameras on the B777-300 is the availability of a 'live' TV viewing of the rear of the engine during start. T'is definately a part of my scan during engine start.
A picture is worth a thousand words, or a thousand gesticulations from the ground engineer.
Regards,
Old Smokey