The Citadel of Chaos

You try the handle and it turns.
You can hear nothing coming from inside the room, so you open the door to look around.
The room is small, with a golden candlestick on a table ...
but suddenly, you hear a creaking sound coming from the floor!
Too late, you realize that the stones beneath your feet are shifting to reveal a trap!
You fall feet first into a pit.
As you hit the bottom you roll sideways, down another passage,
and continue rolling downwards.
Try as you might, you cannot stop yourself rolling head-over-heels
until eventually you come to a halt in a small chamber.
But the shock has been too much for you.
As the world goes black around you,
you hear excited chatterings, then you pass out.