This has to be one of the most poorly written news stories ever, it's almost as bad every alarmist MSM assault weapons hit piece. The Mythbusters had a cannon ball get away from them, but according to the article, it's flight path was wilder than Oliver Stone's magic bullet, or Seinfeld's magic loogie.
TV Stunt Goes Awry, Sends Cannonball Rocketing Through Homes CBS Los Angeles
TV Stunt Goes Awry, Sends Cannonball Rocketing Through Homes CBS Los Angeles