Lisa and Peter have to prepare a presentation on killer whales for school. While a thunderstorm rages outside they are studying their papers in Lisa's attic room. They become engrossed more and more in the interesting facts.
Lightning flashes. Did the orca in the poster just move?
Peter and Lisa are listening to the sound of the orcas. The call goes right through them.
"Eeeoooo!"
A blinding flash ...