Originally Posted by Thom Yorke

Imagine you are in a room with no doors. The walls are made of smooth, solid rock with no places to establish a firm grip, no weak points to break through, and no windows. The floor is made of plexiglass, also with no breakable points, and below, about 200 feet down, you can see nothing but lava. The roof is made of regular, breakable glass, but it is 500 feet above you. You can see that on the other side of the glass is a room filled with water. However, it looks like the roof will hold unless you can somehow come in contact with it to break it yourself. Regular physics apply (ie. gravity exists and is holding you down). You are provided with nothing but a 30 foot long rope, and a pair of regular household scissors. How do you get out of the room safely?