“Have you ever thrown a rock at a bat?”
“What? Why? Are you crazy? I don’t understand…”
Liz picked up a pebble from behind her and stood up, waiting for a bat to fly by.
She hurled it into the air and the bat stopped flying straight and looped around the stone using its bat radar. The persistence of vision left a trail for the rock and the bat, an arc and a loop that stayed under they didn’t... make any sense any more and drifted away into the ether.
“You can make them circle. They sense the stone, circle it and then fly on.”