Nothing because ghosts don't exist. Edit:Holy crap I just realized I didn't post this on /r/antijokes.
Just wait 5 minutes. They'll post about it.
I'll post the answer tomorrow.
Math problems actually exist
Because they don't exist
As John Cena because you can't see them.
She was trying to get ahead!
When you realize that you can't spell country without UN.
You take the letter "f" out of the word "way" (there's no f in way) *joke works best when the person being asked the question has to think about it for some time and says the phrase themselves without realizing what they said
Holy crap.
To go to /r/antijokes
Seriously, I don't know. Maybe 50?