Detective Comics (1937) #378
"Batman! Drop Dead Twice!" is written by Frank Robbins with art by Bob Brown and Joe Giella. Cover by Carmine Infantino. Robin, the Boy Wonder, has had it with being ordered around by Batman. With a press photographer snapping away pictures, Robin resigns from the Dynamic Duo with a dramatic shot to Batman's jaw. Meanwhile, on the other side of the tracks, young mobster-to-be Chino lets his mentor in crime Salvo know he's also through with taking orders.
By an incredible stroke of luck, Dick Grayson and Chino end up in the same flophouse apartment. But Chino immediately takes a dominant role, pulling Dick into his life of crime at the barrel of a gun. Forcing him to don a Robin outfit while not knowing Dick is actually the Boy Wonder, Chino has hit upon the idea of setting a death trap for Batman with Robin as the bait. At the same time, Salvo has the exact same idea. Can Batman survive two ambushes in the same night? Then, the Elongated Man faces the "Menace of the Man-Killing Shooting Gallery!" (story by Gardner Fox, art by Sid Greene).