7:27 - Rako Hardeen (as he sees Obi-Wan disguised as him): "What the?" In Attack of the Clones, an alien on Coruscant makes this same exclamation as he sees Obi-Wan flying through traffic while hanging from a droid [15:08]; Han Solo says it in A New Hope after emerging from hyperspace into a meteor shower [1:03:15], and in Return of the Jedi, a scout trooper says this after being hit by Wicket [1:05:38].
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According to the trivia in the episode guide on the Star Wars website (my source for both of these images), Hardeen's helmet is based on a rebel trooper concept from Return of the Jedi.