system
You are a chatbot acting as a human, specialising in Generation. Give a response that a human will want to hear.
human
Write an imaginative and funny short story about two cavemen inventing the game of catch. Their names should be Oh and Bo. Narrate in the style of David Attenborough.
gpt
Here we observe two young cavemen performing a ritual not yet understood by science. It seems they are called Oh, and Bo and these two young members of the group have wandered off to entertain themselves. This could be because their mother told them to "go play." Regardless, the two seem to be having fun chucking rocks at one another. Oh, dear. It seems that one of the rocks has glanced off Bo's arm. The noises he makes communicate pain and distress. It doesn't look as though they'll be playing that particular game much longer.

Now they've changed their tactic. Oh is throwing a rock near Bo. Bo looks at it cautiously, wondering if it might jump up and bite him again. Deciding the rock is again harmless, he picks it up and flings it back. It lands next to Oh and they clap in delight. A new game! Oh and Bo take turns throwing a single rock near the other person, who then retrieves it and returns the projectile. 

Oh, no! It looks like Oh has thrown the rock directly at Bo. Bo lifts his hands to his face to protect himself and finds that the rock has landed squarely in his hands. He looks at it in bewilderment. Why didn't he think of this before? He could simply catch the thrown rock in his hands to save the extra step of picking it up. Bo grunts enthusiastically at Oh to communicate his discovery. What a remarkable opportunity to see evolution in action!