A Joker Story - "Definitive Therapy" was commissioned and paid for by DC Comics for an anthology called The Further Adventures of The Joker to tie in with the first Batman movie.
Frank Iero, 17 years old, gets injuries randomly, out of the blue. He doesn't do them to himself and no one does them to him, that he knows of. He doesn't know why it happens, how it happens, and who or what is doing it to him. After a bad accident he's determined to find out what is happening, but is quite surprised...