At the climax, when Cliff puts the helmet back on and is about to launch into the sky someone shines a spotlight on him. Of course it doesn't hurt that the American flag is right behind him.
"Look! It's the Rocketeer!"
Cliff has brought the jetpack to trade for Jenny's life, and he has a question.
Cliff: What's it like working for a Nazi, Eddie? Does he pay you in dollars or deutschmarks? [...] Neville: C'mon, Eddie. I'm paying you well. Does it matter who I work for? Eddie: It matters to me. I may not make an honest buck, but I'm 100% American and I don't work for no two-bit Nazi. Now let her go.
The mobsters proceed to cooperate with federal agents to defeat the Germans that show up.
In the middle of the opening car chase, random Mook Wilmer gets a good Indy Ploy. He manages to swap the rocket for a vacuum cleaner, then puts a crate on the car's gas pedal to make it crash and explode (being badly injured in the process), causing the cops to think the device has been destroyed.
Eddie doesn't flinch when Neville holds him at sword point during some tense negotiations and demands a pay raise.
Cliff's debut as the Rocketeer, saving his friend Malcolm at the airshow. And afterwards, he soars through the sky near an airplane, amazing all the people on board.
Neville does an impressive bit of acrobatics during the swashbuckler film shooting at the beginning.
Jenny, an actress, gets kidnapped and actively seduced by her idol. She handles the situation pretty well.
Jenny (after luring him in close so she could brain him with a vase): I finally played a scene with Neville Sinclair.
Jenny seeing through her idol Sinclair's sinister attempts to seduce her with lines from his old movies.
Neville gets a minor one:
(Cliff decks Neville)
Cliff: Where's your stuntman now, Sinclair?
(Neville blocks the next hit and strikes him back)
While the movie flamed out at the box office, its Cult Classic status has held up well-enough that Joe Johnston earned directorial duties on another retro adventure blockbuster virtually on the merits of this film alone, especially since they share similar traits (even down to Stupid Jetpack Hitler tropes).
Not only that, but it was revealed on July 28, 2016, that it was finally getting a sequel.
Cliff gets away from Howard Hughes and the FBI by riding a scale model of the (not yet built) Spruce Goose, to which Hughes says with a smile "The son of a bitch will fly!"
Lothar blazing away at the cops, Guns Akimbo, as they form a firing line and return fire with machine guns.
Jenny breaks a vase over Giant Mook Lothar's head while he's fighting Cliff.
Eddie's henchmen holding Lothar at gunpoint without being ordered to upon hearing that he and Sinclair are Nazis.
"Skyway Robbery" shows how great of a hero Kit is even without the rocket pack. She plays into Sylvester Slapdash's unfamiliarity with how to fly it, and he ends up crashing into a hay bale, and she gets the money back.
