You wake up in a room with four walls, a floor and a ceiling.
There are no doors or windows.
There is light in the room (you are able to see)
On the wall, just above your head is a mirror.
Against the opposite wall is a chair…
How do you get out of the room? Think about this one for a while!
Move the chair under the mirror. Stand on the chair. Look in the mirror. See what you saw. Take the saw. Cut a door.