This fight if you can call it that was hilarious. Obviously not the best moment for Clancy Brown but even he liked it, since it annoyed Oz when they were about to have their climactic moment, but Maroni living in anger so long, the final moments with Oswald leading up to a boiling point with his blood pressure, it was too much and his heart just gave out.
While that part was kinda tragic, Oz's words in the moment made it hilarious, intentionally or not. "What are you doing? Come on, let's go", followed by a frustrated rant on how anticlimactic Maroni's end was.