So.. Where Do We Go Now...

-------
Two astronauts were in a space craft circling thousands of miles above the earth. According to plan, one astronaut was to leave the ship and go on a 15 minute space walk. The other was to remain inside.
After completing his walk, the first astronaut tried to get back inside, but the door was locked. He knocked. There was no answer. He knocked louder. Still no answer. He pounded with all his might.
Finally, after what seemed like hours, a voice from inside the space craft spoke up:
"Who's there?"
-------