Potential Movie Spoilers (Its kinda the core plot tho)
Yes this is obviously in reference to Final Destination Movie/media-franchise
By vehicle I mean like anything. Bus, Train, Boat, Submarine (like the Titan lol), Plane, anything you would plausibly travel on in your lifetime.
I’d ask them if they have a CO detector at home.
Plot Twist: Final Destination is actually just people halucinating from CO poisoning
It’s just a warning from the CO detector lobby. This is your brain on CO.