there are hundreds of movies that were copied and now as quoted inspired from Hollywood movies in Bollywood. Even the Indian audiences recognize right after watching trailer of such movies. But the trend doesn't end. It gets better. Knock Out is an example of that. Movie starts with a corruption money being transferred to a Swiss Account. Then leads to character name Bachchu played by Irafan Khan who gets to a phone booth and makes a call. Right after he hung up the phone, he receives a call. There the story begins. A story about a shooter (Sanjay Dutt) who has Bachchu on gun point and ask him to do things that Bachchu would have never imagined. the story remains excited till the ending. I wouldn't say it was the best movie I have ever seen. but was worth watching once and enjoy. Sanjay Dutt and Irrfan Khan's chemistry works. They both done well as you expect from experienced actors. Kangana Ranaut is natural. Gulshan Grover gets few good lines other than that doesn't get much scope. Is short watch it once, it wont spoil your time.