Shoot yourself.
From Create Your Own Story
You take the gun and cock it towards your ear. Your life has been miserable so far, why not end it now? Uncle Vernon wouldn't care. Aunt Petunia wouldn't care. And Dudley, he would enjoy it. You muster up all the courage you can and shoot. The bullet goes through your head and hits the wall, without killing you.
Why do these things happen to me, you think?
The banging increases. Finally, when the door can't stand the pressure any longer, it breaks. A giant, hairy, man enters. He says, "Oi, Harry. Good ter see ya' again!"
Everyone stares at him, stunned. Then he notices that the door is broken. "Sorry about that." He pushes the door up back to where it was before.