The Best In The World

"I can make you the best in the world at one thing," said the leprechaun.

David mulled his choice over carefully before eventually answering, "I want to be the best in the world at not dying."

The leprechaun sighed, and David smiled smugly. "I outwitted you, didn't I? You weren't expecting that."

"It's not too late to change your mind."

"Nope, that's what I want."

"Very well," the leprechaun responded sadly.

A few moments later, a giant asteroid collided with the Earth. Over the next several months, humanity died off in the apocalyptic conditions. David was the last human alive.