The Empire Strikes Back/Awesome

• During the battle on Hoth, Luke single-handedly takes down an Imperial Walker, by himself. At that, you'll understand why the Emperor is so concerned about the kid; as in, "If the boy can do that with barely a few days instruction from Obi-Wan Kenobi, what could he do once he is properly trained?"
• Little Yoda lifts big X-Wing.
• Luke Skywalker VS Darth Vader.
  • Above all, when Luke is clinging to that ledge, thoroughly beaten by Vader both physically and emotionally. Luke willingly defies Vader's offer - "Come with me, it is the only way." - and steps off the ledge. Not even knowing if he would survive the fall (he does, barely).
  • For Vader, when he starts picking up random pieces of machinery and tossing them at Luke in the middle of the fight. That's when you really understand that, yeah, Luke's pretty handy with a lightsaber, but he is way out of his league here.
• When the Millenium Falcon's hyperdrive finally works thanks to R2.
• Wedge and Wes being the only Rebels to actually take down an AT-AT with their tow cables.
• Boba Fett doesn't even flinch when Darth Vader gets in his face about the disintigrations.
• Really, everything Han did in the asteroid field.