This is where your man managment skills, reading of the big picture, and, common sense come in
The absolute bottom line if we are being factual is, he does not have to go and get the ball at all !
Can we shout a second ball on?
can a sub, coach, player go get it?
if its that much of a rush, the opponent can go get it
unless its the clearest extraction of urine, in the op, am fine letting the gk carry on, when he returms to the fop, a ' thanks keeper' acts in two ways, a thanks for getting the ball, and, a, thanks lets go
Any grumbles around when gk on hs travels, ' its ok guys, i got the time'
with the disclaimer of unless its obviously disruptive, or repeated, there could be dog poo, a fence, nettles, broken glass, couple of wasps, swamp, anything could slow down the gk retrival on top of his own actions