The deaths of all of Noble team in Halo Reach. These are the full cutscenes, not just a part of the scenes in which they die. That it why this video is so long. Here are the names of the team and how they die.
Jorge - Blown up with a ship.
Kat - Shot in the head with a needle rifle.
Jun - Doesn't really die, goes with Dr. Halsey and never re-appears.
Carter - Crashes into a scarab, destroying it,
Emile - Double-teamed by Elites and stabbed in the chest.
Noble Six - Killed when many Elites attack at once.