Humour doesn't translate well to stereotypical cavemen situations.

There was a loud thud at my cave entrance. With growing caveman fear, I went to draw back the tigerskin door, and see who it was.
 At the door stood two cavemen, dressed in well-sewn tigerskin. Each carried a large, flat stone.
 "Hello. We here to tell you about Sun God." Said the first.
 "Yes." Said the second, "he make sun work."
 "We see you busy," resumed the first. "So we leave you slab to look at. Slab blank, writing not invented yet"
I took the slab, and politely closed the tigerskin door. This, I reflected, was stupid. Early society didn't function like this at all, and I'm sure that early religion was nothing like how I portrayed it. I'm very sorry to any lovers of ancient history out there.
 On the bright side, at least I didn't have dinosaurs interacting with humans. That only happens on TV, or at Loch Ness...