Not onscreen, but toward the end of the film a character describes a dream in which he went to the land of the dead and was reunited with his deceased dog.
The entire film is a bit flashy and strange visually, but there is a specific scene when a character is watching TV which has some quickly flashing images
Kind of. In a dream sequence, a person finds a note on the street, looks up, a car is racing towards them, they grimace, and wake up. The moment of impact nor any aftermath is ever shown.