Watching Val Kilmer's facial expression change at that start. "At the drop of a hat, these guys will rock 'n roll."
I'm one in, I imagine, a very small group. But I find Mann's "Miami Vice" to be one of my favorite films of his. It's the most dangerous movie I've ever seen, it (almost) never lets up. Even the sex was dangerous. Heck, the ROSES were dangerous.
The minor nemesis Neptune is one of the scariest characters I've seen, and we only see a glimpse of him. And John Ortiz' Jose Yero. Sheesh. "I'm a disco guy."
The Heat gunfight scene is intense, the audio is amazing. A late friend of mine was in downtown LA during one of the shooting days, and relayed what it was like.
But MV is intense throughout the whole movie. Just never lets up.