Madoff, serving 150 years at the Butner, NC, federal prison, was heard last week getting into a heated debate over the state of the market with another senior-citizen jailbird.

The shouting match got so heated that the inmate pushed Madoff, who shoved back harder with both hands, causing his attacker to stumble.

As the attacker tried to stand up straight, Madoff hovered over him red-faced and glaring, eyewitnesses said.

via Bernies bruising battle — over stocks!.