Danger: Falling Rocks

When a Wall Street tycoon insists that his family join him for an annual backpacking trip into the Sierra, some of his children are not enthusiastic about the idea.

And that's before people start turning up dead. Ranger Dan Courtwright is first on the scene. And with his friend Sheriff Cal Healey, he sticks with it to the terrifying finish, which is a real cliffhanger.

Literally