* BigLippedAlligatorMoment: A few of Stan Lee's cameos, such in ''Star Trek'' where he's [[spoiler:teleported into the transporter room, dressed in a tuxedo and singing "Hello, My Baby!"]], or in the second ''Iron Man'' episode, where he's [[spoiler:sitting on a tiny planet in outer space]].
* EarWorm: The music that plays during the opening credits will become infectious the more frequently you watch, especially since cartoons from season two play it at both the beginning and the end.
* NauseaFuel: The {{Vomit Indiscretion Shot}}s.
* TheWoobie: Most of the superheroes, but Bruce Banner especially. His episode might as well be titled ''Bad Life''.