"Go on, then. There’s no choice, is there? You can only chase after one of us, it’s never going to be me, is it?"
"Back here; twenty four hours!"
The Doctor stared a Mickey for a moment before running after Rose. She was walking a little ahead of him, and his shoelace had come loose. He knelt down to tie it, keeping his eyes on her red jacket so as not to lose her. A shadow fell over him, and somehow Rose was right there, staring down at him, looking extremely different; with longer hair and older eyes. He made to protest, realising what had happened; where she was from, but she bent down and stopped him with a sweet, firm kiss. And then it was over, and without saying a word, she walked away.
He followed her with his eyes, down a dark alley and into the TARDIS, where a considerably older looking version of himself was waiting for her, wearing a blue suit and a solemn expression.
He took a deep, shuddering breath and ran to catch up with Rose.