Female brain cell

Once upon a time there was a female brain cell which, by mistake, happened to end 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: "HELLO! IS THERE, ANYONE, HERE?"

Then she heard a voice from far away: "Hello,

Spoiler:

we're down here!