Two turtles were swimming out at sea and trying to catch jellyfish. One of the turtles was brown, and the other was a bit greener. Actually, they were exactly the same color, but we need to be able to distinguish them in this story, don't we?
They were swimming side by side, just far enough apart so that their fins would not brush as they paddled.
"You know what?" said the green turtle.
"What?" asked the brown turtle.
"It's been so long since I've been jellyfish hunting that I don't even remember how to do it."
"Well," said the brown turtle, "it's just like riding a bike: you never forget."
"What are you talking about?" asked the green turtle.
"I'm not sure," replied the brown turtle.
At this point, they both stopped talking. A jellyfish was floating on the surface of the water ahead of them.
"Look," whispered the green turtle, "I think that's a jellyfish."
"Yeah," replied the brown turtle, "looks like it. You take it."
The green turtle swam stealthily ahead toward the jellyfish, and the brown turtle waited behind. The green turtle slurped up the jellyfish and then turned around to swim back toward the brown turtle.
Before it could reach the brown turtle, the green turtle choked and died, sinking to the bottom of the sea. The brown turtle was left to hunt jellyfish by itself for the rest of the afternoon.