Trapped is an average movie. It is not worth watching in theater. Its one of the movie which you can note down into your list as regular movie. You can better watch Man vs Wild hosted by Bear Grills his show is far better. It could be made better by adding some more threats into it. It has less intense level when a person gets trapped into a room.
Cast - Rajkumar Rao is best at whats he do he is grear at his glance. His acting keeps you glued into the movie hall else there is nothing much more into the movie.
Story - Very casual story but yes plot is different but not much more intresting.
So yes u can watch once at home dont waste money.
Enjoy.