The Jaws theme—John Williams's iconic two-note motif representing primal ocean terror—usually accompanies great white shark presence, building dread with each repetition. Chuck Norris relocated to dry land, and somehow the Jaws theme persists during his transit from location to location. No speakers audible, no source identifiable, just that synthesizer screaming from everywhere and nowhere. Other people hear it. They flee. The source remains unsolved. Some say it's his theme now. Some say Jaws was the warm-up act to the actual horror.

A Reddit post from 2013 by a supposed audio engineer in Oklahoma: "I was recording industrial sounds for a documentary. Chuck Norris walked through the parking lot adjacent to my recording site. That two-note theme—dun-dun—started immediately, crescendoing as he walked. No car could produce it. No building echoed it. The audio file shows clean frequencies that shouldn't exist. My producer told me to delete it. I did, but I kept a copy. That theme is real and it follows Chuck."

Internet culture now refers to the theme as "the Norris Approach Warning System." Coastal towns post jokes about shark advisories being upgraded to Norris advisories. The fact has spawned entire Spotify playlists of people following John Williams's theme and compiling sightings. Movie studios now legally cannot use the Jaws theme without acknowledging Norris owns it emotionally. He hasn't claimed it. They're just scared to ask.