a firefighter grips a heavy hose with both hands as he aims it toward practice targets. A thick, forceful stream of water shoots out from the nozzle in a straight line. The water pressure is so strong that the firefighter braces his feet against the ground to stay balanced. The powerful stream hits a practice dummy and knocks it backward with tremendous force. Other trainees watch from the sides, some covering their faces from water spray. Water droplets scatter in all directions from the impact point. a rapid stream of liquid forced out of a small opening with great pressure