You cant do that in most European countries as the trigger will need to remain engaged for the valve to stay open. So you just stand there holding the pump handle bored the entire time. I get its more safe but I wish we had the same system as they do in the US
There’s usually a little latch on the handle that you can engage so that the valve stays open and you can let go then. No need to keep glued to the pump, even in Europe.
You should still watch the pump though - you’re handling flammable substances.