In case you didn't know- yarn bombing is when everything gets covered in yarn. I'm not just talking throwing a ball of yarn over something like teeping, yarn bombing is when people take time and actually knit around said object, usually a tree or something.
Disclaimer- I don't own the Doctor yet... Stupid time machine not working properly...
"RORY!" Amy yelled from downstairs, waking Rory immediately. Thinking something was wrong, he grabbed the closest nearby blunt object, a book that he was reading the day before, and ran downstairs to his distraught wife.
"What?" Rory said as he saw the living room. Everything, every little thing down to the tiny knick-knacks was covered in knitted yarn. Every color of the rainbow in yarn had covered his whole living room. Rory poked his head in the kitchen and saw that it was the same in there. Just everything was covered.
"Rory, I think we've been yarn bombed." Amy said, looking over the mess.
"What's yarn bombed?" Rory asked, looking everywhere else in the house. It seemed that everything was covered; the only thing that was spared was the stairs that led upstairs and the upstairs floor. It seemed whoever did this didn't want to wake the Ponds.
"It's this stupid trend thing." Amy explained as she examined the knitted yarn that covered the couch. It was well made, not rushed at all. "Who could have possibly have done this in just one night?"
"Uh..." Rory thought before looking at Amy.
"The Doctor." They said together.
"I'll go start some coffee." Rory said as he went to the kitchen and uncovered the coffee machine.
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The Doctor stood in the TARDIS, checklist in hand. He giggled as he crossed off the Ponds and moved to River. Sighing contently, the Doctor grabbed a bag of yarn and got to work.