What are your favorite films that have tried something outrageous and succeeded in changing the game?

I have a few that I love : Old Boy (Korean version) had that extended one-take fight scene that blew my mind. Gozu (Japanese), directed by my all time favorite, Takashi Miike, has the wierdest ending of any flick I've seen. I am watching Hardcore Henry again, and I just love the first-person camera, with the gun fights and parkour. It is sort of reminiscent of Mirror's Edge (video game) and The London Heist (PSVR game).