I have this toy I bought for my daughter. It is called a Geyser Water Cannon and supposedly it works using the Venturi effect. Basically it's a 2 foot cone that starts out with a wide diameter (1 foot) and narrows to about 1 inch - with openings on each end. When you pull down or push down this cone on a surface of water - it can shoot water up to 30 feet. I am all confused by this talk of the Venturi effect as water travels from a wide volume to a narrow one. Questions: 1. Is the water shooting higher not created because I am pushing and concentrating water up a narrow channel and thus the pressure created shoots the water higher?? 2. Doesn't a syringe work in the same way with the opening being smaller in diameter than the barrel of a syringe? And thus the stream shoots higher because of pressure?