Open the door, and take off your limp foot's shoe, and get ready to use it for beatdown.
You crawl up to the door and manage to peel the shoe of your hurt foot. It doesn't actually feel broken, but it's probably not a good idea to use it for the next couple of days. You push the door and with some effort you open it. On the other side you can't see much but the by now familiar total darkness. The little red light that shines through the doorway illuminates a thick fog, and this room seems to be much warmer than the other.
Only my blazer? What about my pants pockets, a shirt pocket if i have one, and my ass? I could fit more rocks.
Yes, you would only be able to fit pebbles and gravel in your other pockets, and while your ass probably could sustain a good amount of rocks, the comfortability issues weigh out the convenience of being able to carry a little more.