What do English-speaking firemen say when they order that pressurized water be shot at a rioting crowd?

Would they still say "Fire?"

Firemen are not likely to shoot water at rioting crowd because the police do it.

OK, what would the police say?

This has all the makings of a joke that would be on the back of a Ice-Cream stick.

If that happened in winter i think they would say FREEZE!

'AVE IT

What would firemen say when they order that water be shot at fire?

Would they say fire, freeze, 'ave it, or something else?

i don't get it. is that a british phrase?

Yeah. Often preface with "FOCKING"

Sadly the urban dictionary definition is not quite good enough
http://www.urbandictionary.com/define.php?...=Mozilla-search

Also if you're enjoying yourself loads, you may shout it. As I did here.

http://tinypic.com/fjib69.jpg