How some prisoners escaped from a New York prison, by their own account.
“Heavy duty fan on the roof that sucks the air out, lot of suction, a lot of people put a piece of newspaper over their vent because it’s so strong that it gets cold in the cell. Mick took a wooden chessboard, glued a piece of newspaper to it with toothpaste (prison glue) and put the chessboard up in the hole kept up with suction; by the indentation it looked like the vent was still there. A week to cut the grill, 4 days to cut the box that was behind the grill. Took them six weeks to get out.”