I've always found DIY prison culture to be absolutely fascinating. Inmates are makers by necessity. In 1999, photographer Marc Steinmetz created this fascinating series of photographs depicting DIY tech found in prisons. The series is titled "Escape Tools." From the artist's site:
(Above left), Rope Ladder with wooden rungs disguised as chess pieces; found and confiscated in an inmate's cell in Wolfenbüttel prison, Germany, around 1993.
(Above right), Immersion Heater made from razor blades; found in a cell in 'Santa Fu' jail in Hamburg, Germany. Jailbirds use these tools to distil alcoholic beverages forbidden in prisons. Your typical inmate's moonshine still includes a plastic can containing fermented fruit mash or juice, an immersion coil of some sort, a rubber hose, and a plastic receptacle for the booze.
Escape Tools (via Street Use)