Yes, it is Bigger on the Inside. (for kellyfookinbee)
But if there was fans of a saga of films The Doctor really did not tolerate, Back to the Future's fans had to be on the list. They were incredibly frustrating, infuriating even. Average humans born past the year 1985 had the awful habit of comparing reality to a -in all honesty entertaining- inacuratte portrayal of time traveling. So what if his time machine did not look like a fancy car with doors that lifted themselves and a digital control panel?! His TARDIS was prettier, sexier! Stylish.
And no, he was not going to bring them a hoverbouard souvenir from the year 2015! Why? Because hoverboards were not yet invented in the year 2015!
Mr Fusion, the fusion generator that turned rubbish into energy was the second thing humans-post-1985 complained about. Who on Earth-- Well, rather who on the universe with a little knowledge regarding cold fusion could truly believe that a can of pop, a banana's peel and a couple more items would be plenty to get a time machine moving? Believing that would be as stupid as taking pointers regarding quantic physics from a baby koala. And koala's were brilliant on maths, but not on physics.
This time the Doctor was thankful to have no geek-post-1985 humans making him a thousand questions regarding why he needed that massive ammount of garbage to get working his Sarcroisax-detector working.
He was dragging bags all the way to the spot where his TARDIS had landed, near a pretty lake, somewhere past the year 2010 for what he could see. It was a nice morning to be dragging bags of rubbish. To be leaving a trail of grabage as well. Well, the Sarcroisax would sure take care of that later!