These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Designated Hero: Rod; highlighted by the bots when they note (whilst erroneously labeling him an Anti-Hero) that the only "heroic" action he takes the entire film is to flash his headlights at a passing police car.
To elaborate on the "error" mentioned: their definition of Anti-Hero is pretty much accurate (in particular, Rod fits into the definition of the "classical" antihero — spineless, ineffectual, etc.); but the film plays Rod up as a straight-up Hero, not as an antihero of any stripe. On the other hand, it's worth noting that he was willing to infiltrate a notoriously dangerous biker gang. Eventually.
Ear Worm: "Wiiiiiiiiild rebels! Those munchy crunchy rebels..."
Moral Event Horizon: The gun shop robbery-murder scene. The uncut version is actually a lot more brutal. The salesmen isn't just shot (as seen in the MST3K version)...he gets his head kicked like a football during a Field Goal. His neck is apparently broken in the process & he bleeds from the mouth (Banjo & Fats mock his bloody mouth). It's a rather edgy scene in an otherwise rather goofy musical (somewhat)/biker film.