Awesome / Metroid Fusion

• The X are the most dreaded species in the galaxy, far more of a threat than the Metroids, the Space Pirates or even Phazon. Thanks to her new Metroid DNA, though? Samus uses them for power-ups.
• Most of the early SA-X encounters in Fusion involve you running and hiding because the feared evil twin can easily kill Samus with one shot of the Ice Beam and Super Missile (in that order). Once you have the Varia Suit, the Ice Beam won't freeze you (still hurts a lot, though), and by the time you meet SA-X again after getting said Varia Suit, you will be able to turn the tables on it by using Ice Missiles to freeze it. It only buys you about one second to run away, but it can give you a real "Who's laughing now?!" moment before running like hell to a hiding place.
• After hearing from her computer that there are at least ten SA-X running around (clones of Samus) and that the Federation is coming down to capture and study them, Aran decides to send the research station crashing down into SR388, even if it means killing herself in the process, which she acknowledges to the computer AI. The computer's personality then changes, deciding to help Samus while taking on the personality of Adam, Samus' long gone commanding officer and old friend. "Any objections, Lady?"
• In a Super Metroid moment, Samus fights the Omega Metroid and a single swipe knocks her health down to one. At that moment, the SA-X appears, ignoring Samus and shooting the Metroid with its Ice Beam. The Metroid kills it, which releases the parasite. Samus absorbs it, which fully heals her, gives back the Ice Beam, and changes Samus' suit color back to the traditional red, orange, and yellow. At this point, you maybe have two minutes to defeat the Omega and escape to safety. You only need 30 seconds.
  • And if that wasn't enough, Samus' ship arrives after the battle to help her escape. Except it wasn't the computer controlling the ship, but the friendly creatures that Samus released much earlier in the game, who also happen to be the same animal friends from Super Metroid.
  • And Off Screen Moment Of Awesome for the Omega Metroid. It started off as a regular Baby Metroid but after it escaped the lab, it immediately starts hunting down and devouring X-Parasites, growing into the Omega Metroid we fight.