Rarr! I'm a big scary ghost, rarr and then oooohhhh!
You're not that big.
Well I am scary, so I'd be very scared if I were you! oooohhh!
I'm not scared in the slightest. You see, ghosts can't touch anything, so there is nothing you could possibly do to hurt me. So go ahead, give it your best shot.
Damn ghost, I'll crush him like this oxygen pipe...ughh...bloody hell...ughh....