memento not the only movie
this movie might be mainly based on Memento but lot of other scenes and characters are inspired from other movies too.
the character Kalpana(Asin) is based on the title charecter from the movie 'Amelie' and also contains a few scenes from the movie.
the things happening around the body in a fast forward motion in the opening scene is taken from the movie 'From Hell'
one of the chase scenes plays the matrix soundtrack running in the background.
and this one is simple graphics done when the title card is taken from X-men