This The Joker photo contains
holding cell, penal institution, penal facility, cell, jail cell, and prison cell.
There might also be
revolving door and revolver.
This mini-documentary covers the character's origins, Alan Moore's Killing Joke, Joker's most famous portrayals, why he can't be killed, and how his influence infects the minds of people both real and make-believe. From Birth.Movies.Death. @ YouTube.