Once upon a time there was a female brain cell who accidentally ended up in a man's head. She looked around nervously but it was all empty and quiet.

"Hello?" she cried, but no answer. "Is there anyone here?" she cried a little louder, but still no answer.

Now the female brain cell started to feel alone and scared and yelled at the top of her voice, "HELLO! IS THERE ANYONE HERE?"

Then she heard a very faint voice echo from far, far away...

"We're down here!"