I think this all the time. Try going in pitch black with a picher of water, a flashlight, and a bowl. As you pour the water in to the bowl shine the flashlight across the water. It will move sightly with the light.
Cedric Diggory “ Cedric didn’t move. He merely stood there, looking at Harry. Then he turned to stare at the cup. Harry saw the longing expression on his face in its golden light. Cedric looked around at.