Chris Diamantopoulos, who guest starred on the final season of “The Sopranos,” said Tony Sirico — who played mobster Paul “Paulie Walnuts” Gualtieri on the hit show — accidentally “whacked” him with a real pipe during a scene.

Chris Diamantopoulos talks about getting whacked by Tony Sirico's Paulie Walnuts on the final season of 'The Sopranos' and his latest project, the Prime Video series 'The Sticky.'

Actor Chris Diamantopoulos, who guest starred on HBO's The Sopranos as Jason Barone, a family friend of Tony Soprano (James Gandolfini), recalled the time a scene involving a prop rubber pipe went wrong and he "got whacked by Paulie Walnuts and lived to tell about it.