The thrill and suspense were like unfolding up at every minute and second of this movie.
The momentum of time and incidents plays the biggest role. As for the actors, their acting was at par and so engrossing that you can't set your eyes off for a second, just like me as the curiosity within you won't let you get diverted off the movie.
The connection to the present and past turns up the events and incidents and changes up as well by defying.