You are in a room with no doors or windows all you have is a bat and ball the room is made of metal how do you get out?

You are in a room with no doors or windows all you have is a bat and ball the room is made of metal how do you get out?
Okay before I answer this question, I want to ask if there is no windows or doors, how did u get in there in the first place? And to get out, hit ur self in the head until ur out :)
On the contrary, I believe you should play some baseball and hopefully outsiders will hear your clanging inside the metal box.
Sorry folks, but that is a very, very old joke. The answer is:
"You repeatedly throw the ball into the air then swing the bat and try to hit it. If you swing and miss three times in a row, you're out."