Thag and Og hunt elk. Kill elk with throw stick and rock. Thag and Og start drag elk back to cave by back hoof. Work very hard.
Cro-Magnon big brain see Thag and Og, make big brain speak, "I say, old chaps. You do relize the the direction of the hair follicles on the hide of that elk is in direct opposition to the direction of your effort. It seems to me, old chums, that if you drag the elk from the other end, you'll have a much easier time of things. Using the path of less resistance, and all that. Ta!"
Og and Thag drag elk from other end. Thag say,"Big Brain right. It am gooder drag this way. Og say,"Am right, but now us farther away from cave."
Thag crush Og head with rock.

From Bennet Serf's "Big Book Of Thang and Og Jokes: Second addition"