Hate horror all you want, but I think Dawn of the Dead (2004) has the best opening sequence of any movie made before or since. What a banger. I’m having trouble thinking of a film that comes close to that open. Maybe Leone’s Once Upon A Time In The West?

The Matrix is also a strong contender. I saw it in the theater and the bit in the cold open where Trinity jumps and the film goes into bullet time, the whole audience gasped. That was magic. Glad I got to experience that.