What's the best 90 minute movie you've ever watched?

As the title suggests, I'm trying my best to compile a list of the greatest 'tight 90-odd' minute movies.

I love a good marathon film as much as the next person, but I'm current struggling to defeat the ever challenging battle of staying awake long enough to complete most of the movies currently collecting dust in my Letterboxd watchlist on a weeknight.

So, I come to you fine people for your help; what's your favorite 90 minute movie ever? Any genre, any era...

Edit: 90-odd is dealers choice for interpretation. Let's say anything 90 and under and nothing over 101 mins.