Amy had just gotten dressed and was still towel-drying her wet hair when she heard someone pounding at the walls. Thinking at first that it was just the Doctor, Donna, or one of the other current residents of the TARDIS, she opened the door and cried, "Gimme a minute, yeah? I'm almost done!"
But the hallway was empty, and the noise was even louder out here. As Amy made her way towards the control room it got louder and louder until she realized it must be coming from outside. Amy swung open the door, shivered a bit as the cold freaky-winter chill hit her still damp hair, and yelled "OI! Quit yer bangin'! People live in here, yanno!"