Because I'm Brickbat!

711 was a peculiar superhero who stayed in jail during the day and escaped his cell nightly as a cloaked crusader that used his prisoner number as an alias. It is possible that he was popular enough to inspire a particular chain of convenience stores years later to use the same name, but the confusing character regularly dealt with generic gangsters in his after-hours excursions. The only adversary he ran across that could be classified as a supervillain was the even more baffling bad guy that called himself Brick Bat. Taking place in Quality's Police Comics #5, he started out as an ugly thug wearing a regular outfit with a fake Batman cowl which barely fit him well, as you could imagine himself constantly fastening his mask from falling off. Brick Bat hired a scientist to make an inventory of brick-like objects that each contained poisonous gas when broken, for which the scientist was paid for with an assault of his own creation so Brick Bat could own the patent on exploding bricks. The Dark Knight knockoff went on a crime spree with his new brick/gas grenades which 711 hears about while he is working in his prison warden's office. 711 uses his Shawshank hole to bust out that night and tracks down Brick Bat now on his latest victim. All 711 had to do was dodge a few bricks to bust the bat in the chops and send the flightless rodent flying. 711 covers his tracks of knowing about Brick Bat's arrest with his warden the next morning by claiming to be psychic. Brick Bat has become kind of a celebrity over the years by as one of the first gimmick villains in comics. It's just that instead of being the gimmick villain they deserved, he wasn't the gimmick villain the Golden Age needed.