You use the metal chair as a booster and start examining the ceiling.
You brush over a plate of glass that seems to move in a little.
Maybe this is it!
You push on it.
A trap door swings open right below the chair.
Before you know it, you're falling.
The chair tumbles down a metal ladder, and so do you.
BANG!
You hit your head, hard.
Too hard to think, ever again.
END