Knock Out (2010) is a Bollywood Thriller Movie released on 15 October, 2010 (India). The movie is an official remake of Hollywood Movie Phone Booth (2003). Knock Out was produced by Sohail Maklai and directed by Mani Shankaar who also written the movie. The movie stars Sanjay Dutt, Irrfan Khan, Kangana Ranaut and Gulshan Grover in lead roles. The movie was a commercial successful one.

Knock Out (2010) Movie Plot: While leaving the telephone booth after making a call, Bachchoo (Irrfan Khan) hears the phone ringing. He timidly picks up the phone and the person on other side of the phone threats him not to cut the call otherwise he would shot dead. A nearby person is also shot dead by the caller to let Bachchoo know that this is not a prank. 

A news reporter Nidhi Srivastava (Kangana Ranaut) was assigned to cover the story and Veer Vijay Singh (Sanjay Dutt), IB Chief, is assigned to look into the matter. But the matter is not as simple as it appears.