You are fully enclosed in a steel box with no openings (no doors, no windows, no chimney, no vents, etc.). The top, bottom, front, back, left, and right walls are all 5 ft. thick. You have enough air to last only 1 hour before you will suffocate. The only 2 items you have in the room with you is a saw and a piece of wood. The saw is too weak to cut the steel walls and will actually break the saw if you try. So, how do you get out?