The suspect, Anthony Miranda, 24, now has two black eyes, facial bruises and other injuries, as a result of the confrontation with the would-be victim.
Police say it started when Miranda pulled a gun on a motorist near 55th and Kenneth on Friday night. During the scuffle, Miranda got roughed up by the motorist -- who told police he was trained in mixed martial arts.
Miranda also ended up shooting himself in the ankle by accident.
Miranda, whom police say is a convicted felon, is charged with armed robbery and aggravated discharge of a firearm. He was back in jail Tuesday.