Creative Inventors
The trios plan involved a lot of creativity and smuggling, but they finally found a way they could escape their cells. The three criminals created drills from a vacuum cleaner to create a whole where the air vent was in their cells.
This is where one should be asking how they got away with drilling a hole in the wall in their cell. This is where the plan got extremely risky in that Morris would play his accordion to cover up the noise of the drill. This is what enabled the three prisoners to get away with drilling holes in their cells.