We’re all serious at the outset of the show talking about Spy planes overhead still watching Minneapolis and the article it’s based on (Spies in the Skies) when Phil pipes up. He exclaims, “De plane! De plane!” referring to a reference that became a meme in the late 1970s from a show called Fantasy Island.
Here is a video on YouTube of the opening of this (at the time) wildly popular show and, at about 37 seconds in, comes de plane reference seemingly everyone used at the time (and some living in the past still do!).