For the non-video explanation >A mechanical valve in the pump handle detects a change of pressure and closes, preventing the flow of fuel [Wikipedia] https://

For the non-video explanation >A mechanical valve in the pump handle detects a change of pressure and closes, preventing the flow of fuel [Wikipedia] https://en.wikipedia.org/wiki/Gasoline_pump#Automatic_cut-off https://en.wikipedia.org/wiki/Gasoline_pump#Automatic_cut-of...