In article 483d43a6@qaanaaq, Andy Hall wrote:

This doesn't happen because the trip mechanism in the handle still
works. All petrol stations I have used in the U.S. have the latch
wires on the pump handles. I have never seen a flood of fuel.

I've encountered pumps where the cutoff doesn't work reliably (and got
a leg splashed in petrol as a result). Had these pumps been able to
run unattended, I'm not keen on the idea of what might have happened.