A commercial for running shoes illustrates framing shortcuts and errors. Two barefoot men are bantering as they walk in an African savanna. Suddenly, they spot a growling lion. “Do you think you’re faster than a lion,” asks one as he watches the other put on his running shoes. “No,” says the man, “but I’m faster than you.” And with that he runs away. Next we see the lion closing in on the barefoot man, who lags behind.