John thought nothing of the strange whirring sounds coming from the kitchen. He'd long since learned that if something bled, oozed or produced toxic fumes then he should stay well clear of it. The sounds were strange, but if anything that just meant they were more radioactive than usual.

"Sherlock?" He called, it was always best be on the safe side when it comes to his flatmate, "You alright in there?"

No answer.

"Sherlock? Can you hear me?" Silence. John began to worry slightly as he got up and started walking towards the kitchen, the whirring noises had stopped and this only served to increase his angst at the lack of a reply. When he reached the kitchen though, he halted.

"Sherlock?"

"Yes John?"

"Why is there a blue police box in our kitchen?"