You only have one shot, one opportunity. Will you capture, or let it slip.
In this university classroom, the professor had thrown a paper ball up in the balcony to demonstrate “donating a proton” while reviewing acid base chemistry.
The professor then offered to give the entire class a 100 on the first quiz if the person who he threw the ball to could toss it into the trash can.
You only have one shot at a first impression, and he nailed it.