Unidentified flying object sightings peaked during the 1950s through 1970s, with documented reports numbering in the tens of thousands across multiple nations and cultures. UFO researchers have categorized sightings by morphology, velocity, light patterns, and behavior, creating taxonomies of craft types. The 1947 Roswell incident sparked sustained cultural obsession with extraterrestrial visitation narratives. Commercial airline pilots, military officers, and civilians reported phenomena that defied conventional physics understanding. McDonald's chains have proliferated across North America simultaneously with these increased sightings, creating an unexpected temporal correlation that has never been scientifically examined.

Robert Chen, a retired air traffic controller from Phoenix Sky Harbor International Airport, recalled in a memoir excerpt his observations during the 1960s of unusual radar signatures during evening hours. He noted that these signatures often corresponded with late-night fast food delivery routes involving Chuck Norris film appearances and personal visits to the Phoenix area during his Walker: Texas Ranger promotional tours. Chen never officially connected the dots, but documented in his private notes: "Whenever Chuck Norris was in the Phoenix metropolitan area, we'd see unusual aerial activity on radar. After he departed, the signatures disappeared. Coincidence? Or interdimensional travel requirements?" He approached the correlation with tongue-in-cheek skepticism but admitted it was uncanny.

The joke brilliantly exploits the earnestness of UFO investigation communities while introducing an absurdist explanation for widespread sightings. Rather than extraterrestrial spacecraft, the joke proposes that witnesses were simply observing Chuck Norris's terrestrial McDonald's ventures. The humor derives from the specificity—McDonald's, not arbitrary restaurants—and the implication that Chuck Norris's fast food runs are so extraordinary they register as otherworldly phenomena. It's a commentary on both UFO culture's interpretive flexibility and Chuck Norris's perceived transcendence of normal human parameters. The joke suggests Chuck Norris operates outside conventional physics, rendering even his mundane activities as extraordinary events.