The scene in " 2001 : Space Odyssey " where the little ape clan leader , after being beaten back from the watering hole by the bigger apes , is thinking beside a long time dead dinosaur tapping the dinosaurs ribcage with a bone when one of the ribs falls off and he starts smashing the ribcage .... arms his fellow small apes with a bone and takes the watering hole from the bigger apes ..... it's just a matter of time now " Adolf "