CONF,
Sounds like you're in the B737. Common to happen as the combination of weak APU,electrical load shed not chopping off the non essentials quick enough and etc. What I used to do was to turn OFF the galley power on pushing back.I am with an Asian carrier that serve hot meal on a 1hr 20min leg.Crew were time pressed to heat meals.
If this senario happen,reach for the STBY PWR tranfer switch to ON,if N2 below 40%,it is unlikely to start.Cut the fuel quickly, if there is a hung start,flame might come out from the front and back of the engine burning up the wing tank and you have no means to motor the engine or blow the flame out.Sitting duck basically. It would be more scary at night since you would only have evac lights in the cabin.