This movie felt really short!

I just watched this movie and it felt way shorter than its running time. It is a 2 hour movie but it felt like 1. And it's weird because it's a character-driven drama, its pacing isn't really that fast and there are no explosions and car chases. I can't explain why it felt so short, perhaps because of how engaged we become from the very beginning. It is a gripping story, and a unique one. I've seen great movies that feel longer than they really are, but this one definitely felt short to me. But it is certainly a great movie.