As a lot of the flying PD does is hover, it is not uncommen to turn of the aft pump when light appears.
Are you really sure? Hover means noseup attitude, so the light would first appear at the FWD pump.
BTW, its not uncommon to turn the relevant pump off, its procedure according to ECL.
But after departure and commencing cruise attitude, the aft pump will illuminate ( assuming main tank is almost empty ) , because the fuel will then be in the forward section.
And now you forget to switch on the FWD pump again. Guess what happpens....
skadi