"Oh, that's cool! Mom won't let me use slingshot anyway. She thinks it's dangerous."
"Then you'll love this part. I'll drive, and you lean out and scare away the blueberry pelicans with tiny sponge balls."
Marty is doing a good job and manages to scare off every pelican for a while. But on the tenth track, there are so many of them that slingshot is not enough.
What can Marty do?