This exchange between Samael, War and the Watcher. The background music and accompanying dialogue delivery between Vernon Wells, Liam O'Brien and Mark Hamill make this my favourite cut-scene in the first game by far.
Samael: The Griever moves in tunnels beneath this place, but first - there is an... Obstacle. That must be removed. Ulthane. One of the Old Ones.
War: You didn't mention that before...
The Watcher: Changing the deal already, Samael?!
Samael: Be silent, filth! (Bitchslaps the Watcher across the platform.) My business is with the Horseman. Ulthane is no ally of the Destroyer - but you won't find the Griever without confronting the Black Hammer. And that will require strength you don't possess... Heh. Yet. (Telekinetic manipulation on the Watcher.)
The Watcher: What - the - hell do you think you're doing, Samael?
Samael: Tell him, Watcher. How you stifle the Horseman's true power in order to keep him on the Council's leash. War! Destroy this parasite...
The Watcher: You so much as blink at me! And the Council will end you! Both of you! I'm protected!
Samael: Not - in here. (Turns to the youngest Nephilim.) You are War! Rider of the Red Horse! Not some puppet! On this pathetic, creature's strings...!
The Watcher: War!! I will make you suffer!!!
Samael: Focus your anger, a great rage stirs within you. Clawing to get out. You must release it! Or a prisoner, you will remain...
War: RAH!!!! (Eyes glowing with power he punches the Watcher into the dust with his massive robot hand and unlocks his super mode.)
Samael: You are reborn! Hah! Hah! Hah! Hah! Hah! Hah! Hah! Hah! Hah! Hah! Hah! Hah! Hah!