Coherence (2013)
A prime example of what can be accomplished with small budget and great story writing.
I remember trying to watch this movie 2-3 years prior, but stopped after 10 mins because of slow pace(perhaps because I was more restless back then). I am glad I finally gave it another chance(thanks r/MovieSuggestions!).
The cast includes no well-known names but they make up for their acting, made even better by improvisation of dialogues thanks to the director James Brykit.
The premise is simple: a group of friends meet for a dinner party, and start experiencing weird phenomena when a comet passes overhead.
The movie may not be the best I have seen, but it is one of my all time favourites now, simply because the entire crew put their efforts into it. The attention to even the minutest of details and the suspense until the last 20 minutes add to the tensed environment throughout the movie.
I won’t include spoilers but will just share this chart(by tectactoe) to better understand the timeline in case anyone finds the plot(or some parts) confusing.