It looks like Mike Tyson wasn't just flapping his gums when he revealed his intention to stage a comeback. Video posted Friday on Twitter shows the 53-year-old taking part in a sparring session -- and his punches appear to land on his partner with the impact of a wrecking ball. In an interview with rapper T.I., the former heavyweight champ on Thursday unveiled his plans to return to the ring for small, non-title bouts. "I want to go to the gym and get in shape to be able to box three- or four-round exhibitions for some charities and stuff," Tyson said. "Some charity exhibitions, make some money, help some homeless and drug-affected motherf***ers like me."