Ask for several films with strange plots and shooting techniques and unexpected endings. It better be about time and space.

Mulholland Road, Downey Dakota and Stay in Life and Death (these three books are profound about life and death of time, space and the universe, but I don't understand them very well anyway).

What's left is the shooting technique or the unexpected ending:

Magician (recommended), deadly magic (highly recommended! ), memento mori (recommended), Fight Club (recommended), Butterfly Effect (there are several, the first one is the best, recommended! ), another dimension of kill array (there are several of these, and the first and second parts are not bad, recommended! ), zodiac, seven deadly sins (recommended! ), fog, psychological warfare (recommended! ), horror cruise ship (don't be influenced by the translation of dog blood, this is actually a very magical movie! Recommended! ), two small guesses (French version, awesome! But a little literary), identity (highly recommended! ), chainsaw scare I (note that only the first one is the one with an unexpected ending), master key (very different, recommended! ), Shutter Island (This movie is just too long in the middle. If you can keep reading, you will find that the ending is amazing ~ ~)