Watch CineCalidad. Ambush is a 1988 Filipino action film directed by Francis 'Jun' Posadas and written by Jerry O. Tirazona. It stars Ronnie Ricketts, Dick Israel, Sonny Parsons, E.R. Ejercito, Leo Lazaro, Bobby Zshornack, and Beverly Vergel. The film depicts an armed struggle between the New People's Army's Sparrow Unit and the Armed Forces of the Philippines.