Gravity's a funny thing. It Makes all sorts of things fall and stay there. Does the pocket dimension in the Bag of holding have the same gravity directions as we do?
For example. I have a pile of china that I looted from a castle in 5e. I place it inside the bag of holding. I then shake the bag violently. Maybe I'm getting on a horse, and the horse doesn't approve, maybe I trip and roll down a ravine, maybe I decide a bag of holding is an adequate juggling tool. Is my china destroyed?
Now onto the other meat of my question. Other people have asked if the Bags of holding can be escaped from, by opening the flap and waltzing out. Well... what happens if the Bag is placed upside down in a bucket. The flap can no longer open. They are essentially trapped until they die 10 mins later. What they think is up, actually isn't.
These bags of holding I feel like make up some of the greatest debates, and most thought provoking concepts of almost any magical item.