Bang Boom Bang – A Sure Thing is a German comedy film from 1999. The movie is set in Unna, Westphalia. It was filmed in Unna as well as in Dortmund. Together with "If It Don't Fit, Use a Bigger Hammer" in 2002 and "Goldene Zeiten" in 2006 the movie forms the "Unna-Trilogie" by director Peter Thorwarth, which was named after Unna, Thorwarth's hometown.