The Wizard of Oz, Rainbow created "Bunker Boy." The clip is one of Rainbow's most savage, calling Trump a coward for hiding in an underground bunker; the comedian even wears a Cowardly Lion constume at one-point (as a partial ode to the video's inspiration, as well as a comment on Trump's very apparent fear).
Trump, for his part, claimed he never hid in a bunker but only was there for a "tiny" amount of time to "inspect" the space.