Air is blown through an inverted funnel, and a ping pong ball or similar light object is supported in the funnel's apex. The high-velocity air flow through the narrow opening creates a low-pressure area that effectively holds the ball in place. This illustrates Bernoulli's principle, which states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure. The stable position of the ball within the funnel showcases how changes in air pressure can influence the behavior of objects in a fluid stream.