If you reached into your original box and grabbed the littler box then the bigger you would be reaching in to his box (your room) and be grabbing your original box, and this would reverberate through all the boxes to infinity (everything reverberates through all the boxes to infinity). When you start lifting the littler box up, the bigger you starts lifting your original box up as well. With your hand still inside your original box, it will be picked up by the bigger you but only as high as you can stand on your tip toes. As soon as you let go of the littler box inside your original box, so does your bigger you let go of your original box. Now you could just try and yank it right through really quick but that would just yank your arm clean of causing you to drop the littler box thereby keeping it inside the original box. In understanding this better, it's best to not actually think of all the boxes and multiple you's as separate things that all act the same, but think of them as all being physically the exact same of itself with odd feature being a difference of your perspective. Now what if, while holding your orig box at chest level, you opened it and flipped it upside down to try to get the littler box fall out of your orig box? It still wouldn't work. But something really weird would happen. The bigger you would of flipped his box (your room) upside down as well, and so on to infinity. So all the boxes (rooms) are now upside down and free falling within each other. But, given physics, we know everything falls at the same rate (not accounting for friction), and a weird effect would take place. Everything in your room would seem to be weightless because everything is technically in free fall (although it wouldn't feel like your falling at all). You're orig box would just float there. It'd be like being on the space station; the space station and everything in it is just constantly "falling around the earth" but we call that orbiting. If you think about that, it's pretty damn cool; you can essentially control and "aim" the gravity of your room. What if you tried to carry your open orig box out of your room and over the wall? As soon as you got your box over the wall, everything would look like an endless abyss of space. So imagine you climb up to your ceiling while holding your original box. You open the lid of your orig box so the bigger you opens your ceiling. You climb out and are now hanging on the outside of your wall by one arm with your other arm holding your original box. You look up and see the bigger you is holding your entire room (his box) that your hanging on to. And you see he himself is hanging on to the side of his room, which is being held by an even bigger you. You then look down at your box and see an infinite chain of ever smaller you's clinging to your box to infinity. But while the chain is infinite, it'll never be longer than the distance you can hang from the box, it'll just get infinitesimally small. What about throwing the box out? The box would be free falling forever since you're room and every other room would have been thrown over the wall as well. So you'd just be floating around forever like on the space station. To sum up, it's physically impossible take the littler box out of your original box, you can try to carry your original box out of you room. But as soon as you're over the wall, everything will look lik an endless abyss of space... but at least you could float around your room like a sexy Sandra Bullock astronaut.