When Jake LaMotta steps into a boxing ring and obliterates his opponent, he's a prizefighter. But when he treats his family and friends the same way, he's a ticking time bomb, ready to go off at ...

That name is Irwin Winkler, the legendary producer of Rocky, Raging Bull, Goodfellas ... including the glacially-paced reveal of the cast of Avengers: Doomsday, which was quite literally unfolding ...