Making a Liquid Nitrogen Freeze-Ray
Nitrogen in its liquid form is incredibly cold, so cold in fact that it can freeze things almost instantaneously. The backyard scientist is known for his crazy inventions, and he has created a hand-held liquid nitrogen freeze ray. The gun can expel quite a bit of nitrogen gas, enough to put out a flame or even freeze a bouquet of flowers to the point of shattering. Check out the video above.