I don't know if it counts because it's not technically a dream but I want to shout out I'm Thinking of Ending Things. That movie feels like you're in someone's head, like you're watching someone's subconscious in free time. Characters talk over the ends of each other's sentences, the dialogue and performances are stylized in an inconsistent way (as if someone keeps changing their mind about how these people talk), character names and layouts of rooms change randomly, shots linger longer than they need to or cut abruptly in an uncomfortable way, even the sound design feels unnatural.

Everyone knows Kaufman is an accomplished writer but he really impressed me with his directing choices in this movie.