An internal-door can be jammed or unjammed. An internal-door is usually unjammed. A jammed internal-door is usually open.
Instead of opening or closing or bolting or unbolting or pushing or pulling or turning or rubbing a jammed internal-door: say "You put all your weight against the door, but it doesn't budge. It's stuck just a little bit open."
Instead of examining a jammed internal-door:
if there is a hazard in the location:
if there should be darkness:
say "It's blocked from this side, but you can't quite see what it's caught on in the dark.";
say "It's blocked by [a random hazard in the location].";
say "Something's blocking it from the other side. You can push it about a foot open but no more."
Definition: a thing is bulky if it is not the notebook and it is not part of the notebook and it is not the silver key.
Before going through a jammed internal-door when the player carries a bulky thing: say "The door won't open more than about a foot. You might be able to squirm your way in, but not while holding [the list of bulky things carried by the player]." instead.
First before going through a jammed internal-door with something: say "The door won't open more than about a foot, so there's no way [the thing gone with] will fit." instead.
Report going through a jammed internal-door: say "It's a tight fit, but you manage to squirm your way through the opening.".
A hazard is a kind of thing. A hazard can be cleared or uncleared.
Before pulling or turning or rubbing or taking a hazard: try pushing the noun instead.