While hiking in the woods, Nate and Sam found this huge rock which had an old iron lever attached to it.

While hiking in the woods, Nate and Sam found this huge rock
which had an old iron lever attached to it. Etched into the
rock was the following inscription: "If this lever is
pulled, the world will come to an end!" Nate wanted to pull
the lever and see what would happen, but Sam, being a
paranoid pessamist, greatly feared this! He said to Nate
that if he tried to pull the lever, he'd shoot him! In a
daring attempt, Nate lunged for the lever, and sure enough,
Sam shot him! What is the moral of this story? Better Nate
than lever!