Joke for economics nerds

A physicist and an economist are invited to a classroom to make a presentation to get the children interested in their field of study. The physicist goes first. He produces a ball and announces, “I will time this ball falling to the ground and, without looking at the stopwatch, tell you how long it took”. The physicist knows that gravity accelerates at 9.8 m/s2, so he holds the ball exactly 1m in the air and drops it. “0.45 seconds!” he proclaims. He displays the stopwatch to the class who gasp and clap in amazement. The economist is jealous and declares “Fraud! You know that gravity accelerates at 9.8 m/s2 and calculated the time to fall at 1m! Anyone could do it! See here!” The economist snatches the ball from the floor, holds it exactly 1m above the ground, and drops it. It flies out the window.