Related:

• You are in a room with mirrors on all the walls.
• it's as if the whole world was suddenly destroyed, but not by an explosion -- an explosion is something hard and solid -- but destroyed by .
  .. some horrible kind of softening ... as if nothing was solid, nothing held any shape at all, and you could poke your finger through stone walls and the stone would give, like jelly, and mountains would slither, and buildings would switch their shapes like clouds -- and that would be the end of the world, not fire and brimstone, but goo....
• The walls told me not to talk to you.
• You are in a room with pictures of many geometric shapes painted on the the walls.
  The only way out is the way you came in....
• You are in a small room with marble walls, floors, and ceiling Your Your foot steps echo.
• A cloud of purple smoke suddenly appears out of thin air.
  You hear a hollow voice say, "Please don't climb the walls....
• Ouch! You ran into one of the mirrored walls.
• I brake for brick walls.
• The walls have ears.