You want to play things smart.
Better to go over every part of the wall before rushing into a rash decision.
You head over to the wall and place your hands flat on the glass.
You scan every inch you can of the first wall—nothing.
The second wall—nothing.
You start to freak out. What if the way out is on the ceiling?
Do you:
9: Keep scanning the walls
10: Try and examine the ceiling