Thought this would be interesting. Here one of mine. Still gives me chills.
One ending that stands out to me is Festen ('98): watching him watch his dad walk away and the volume of the background chattering being turned up.
Planet of the Apes.
25th hour is a banger, not seen that in a while.
of course, The Cook, The Thief, His Wife & Her Lover.
it’s available on youtube, but i’m not posting the link for 2 reasons — 1) very poor quality, and 2) preventing those who don’t know about this movie from watching this episode accidentally.
also, Balada Triste de Trompeta (a.k.a. The Last Circus in English).
it’s available on youtube only partially — rather a scene after final then a real final.
The Cloverfield Paradox - a very good unexpected ending. Best bit of the movie actually!
The Sting (classic Newman and Redford).