"In 1966, Andy Dufresne escaped from Shawshank prison. All they found of him was a muddy set of prison clothes, a bar of soap, and an old rock hammer, damn near worn down to the nub. I remember thinking it would take a man six hundred years to tunnel through the wall with it. Old Andy did it in less than twenty. Oh, Andy loved geology. I imagine it appealed to his meticulous nature. An ice age here, million years of mountain building there. Geology is the study of pressure and time. That's all it takes really, pressure, and time. That, and a big goddamn poster. Like I said, in prison a man will do most anything to keep his mind occupied. Turns out Andy's favorite hobby was totin' his wall out into the exercise yard, a handful at a time. I guess after Tommy was killed, Andy decided he'd been here just about long enough. Andy did like he was told, buffed those shoes to a high mirror shine. The guards simply didn't notice. Neither did I... I mean, seriously, how often do you really look at a man's shoes? Andy crawled to freedom through five hundred yards of shit smelling foulness I can't even imagine, or maybe I just don't want to. Five hundred yards... that's the length of five football fields, just shy of half a mile."
—Red, The Shawshank Redemption