<P> On 3 July 2014, the first UK trailer of the film was released by StudioCanal UK . </P> <P> The film was met with generally negative reviews from critics . On Rotten Tomatoes, the film holds a rating of 35%, based on 107 reviews, with an average rating of 5 / 10 . The general consensus reads, "If it doesn't completely avoid thriller clichés, Before I Go to Sleep still offers a stylish, fast - paced, and well - acted diversion ." On Metacritic, the film has a score of 41 out of 100, based on reviews from 31 critics, indicating "mixed or average reviews". </P> <P> It has been unfavorably compared to Memento, a film released nearly a decade and a half earlier . "What the brilliant' Memento' once used as a way to explore a truly inventive way of storytelling is here just a gimmick . It's shallow, it's silly, it's pat . It's...forgettable," wrote the New Jersey Star - Ledger . "Christopher Nolan's 2000 brain - twister' Memento' starred Guy Pearce as a man with a similar malady . The earlier film rigorously stuck within the logical confines of its premise . Joffé's is filled with far too many contradictions and implausible situations," wrote the Philadelphia Inquirer . </P> <P> Kidman's performance has been positively received . Writing for Daily Star, critic Andy Lea said in a positive review that "Kidman puts in a chilling performance as the frail but determined Christine ." David Edwards of Daily Mirror stated, "Leading lady Nicole Kidman hasn't been this good in ages" finishing with "Kidman is on top form as the nervy, spiky woman walking a psychological tightrope ." </P>

What happens at the end of before i go to sleep