My son was watering our little patch of vegetables this weekend, when he suddenly fell down on his backside. He jumped up and said, "Hey! The hose knocked me over." I am suspicious that he may have been dramatizing a little bit. However, it was fun to talk about.
Not only was the water being forced out of the hose, it was putting a force back on the hose. For every force there is an equal force in the opposite direction.