One of the prisoner's cups his hand and throws the other one out the window.
Two inmates are locked in a cell. There is a window that isnít barred but it is high up in the cell. No matter what they try to stand on they cannot reach the window. Then one of them decides to try and tunnel out. They give up tunnelling because it is taking them too long. Finally, one of them manages to work out how to escape. What is the plan?