Go to your cupboard
From Create Your Own Story
While you are hiding in your cupboard, Uncle Vernon appears. Once he squeezed through the cupboard (which he had a hard time doing), you say, "Where's my letter? Who's writing to me?"
Uncle Vernon says quickly, "No one. It was addressed to you by mistake. I have burned it."
"It was not a mistake! It had my cupboard on it!"
"SILENCE!" Uncle Vernon yells. Then he smiles painfully. "Yes, Harry, about this cupboard. Your aunt and I have been thinking... You're getting a bit big for it. We think it might be nice if you moved into Dudley's second bedroom." Uncle Vernon directs you to move all of your things to Dudley's second bedroom.
When you finish, (which takes about 30 seconds), Dudley bawls like a little baby. "I need that bedroom. I need it! Make him get out!"