Is this the right trail? It must be! Look at all those bodies of the people that slipped and didn't make it! There's a detailed picture on page 348. Oh well, too far to quit now.
I've heard it slightly differently. Two men are at a bar and both of their drinks have been poisoned. One of the men is thirsty, so he takes a few swigs and his drink is gone quickly. He doesn't die, but the other man does. Why?