Whoever thought of calling those thinly padded platforms "seats" had a strange sense of humour and little knowledge of furniture. On long multi-leg transits to the Pacific, I was soft hearted enough to give up part of the time from my comfy Nav Rad seat to the two crew chiefs who were required to keep the beast moving (unless a fault developed in Hickalulu of course). Saved trampling all over them when taking sun shots through the roof.
We invariably did an escape drill with the two crew chiefs prior to deploying - they soon learned to be quick off the mark to avoid 14 stone of high speed nav trying to overtake them.
As for changing fuses, I confined myself to 28v; no way I was crawling over the entrance/exit door to grope around among the 400v b*ggers. Hard hats and straps were usually worn only for take off to TOC and from TOD to landing (and on the rare occasions when we left our lofty perch to do a "self-probe on a surface contact - yes, alright, it was 27 MRR and the other role).