In the first episode the Smokey the Bear parody is in a commercial telling the viewer "only you can prevent big vats of acid" while standing next to a vat of hydrochloric acid. When Ethel runs by chasing Steve they knock him into the vat and he promptly disintegrates, made more hilarious by his agonized gargling. The scene then cuts to a board meeting and the network president loves it.
Woody telling Malloy that he had post-traumatic stress disorder before he met him, followed by a cutaway of Woody dressed in what looks like an SS uniform with a gun to his temple in one hand and a Kermit the Frog puppet in another.
In episode 4 the rangers are on the roof trying to avoid being eaten by the army of bloodthirsty Squabbits. The Squabbits notice a helicopter but rather than try to get into it and pilot it up to the rangers like you would expect, they form together to become a helicoper.
In episode 8, Ethel swats a fly obliviously. Denzel congratulates her on her relaxed attitude about animals, but is interrupted.