Actually, a sequence of two shots. From an article published in July, 2001:
At the recent Billiard Congress of America Open 9-Ball Championship at the Riviera Hotel & Casino in Las Vegas, Oliver Ortmann was playing Ernesto Dominguez, and he needed two more games for the match. On his break, the 9 stayed at home, as expected, and the back ball, shown as the 6 in Diagram 3, came four cushions directly at the 9. In a minor miracle, the 6 hit the 9 just right to send it into the corner pocket. Tough luck for Dominguez; if any ball had touched either the 6 or 9, Ortmann wouldn't be "on the hill." Ortmann broke again, and as if it were on tracks, the 6 came around four cushions, hit the waiting 9 ball, and the match was over.
At "home" means the nine ball did not move at all on the break shot which is what you often get for a tight rack. The article was about why nine ball is broken. The full article is:
http://www.sfbilliards.com/articles/2001-07.pdf