A driver named Jeremy made a wild discovery when dealing with a tailgating Tesla. He took to Instagram to share his new life hack: “If you throw on your hazards in front of a Cybertruck it automatically slows down.” Despite many amusing comments, there’s no conclusive evidence this works.

Many Instagrammers couldn’t help but crack jokes about this hazard light hack. Comments ranged from: “I’ll be testing that out” and “gonna try this now ?.”

One commenter weighed in with a helpful distinction: “If available in your market region, Cybertruck automatically reduces driving speed when lights from an emergency vehicle are detected when using Autopilot at night on a high speed road. When this happens, the touchscreen displays a message informing you of the slowdown.”

Is the latest Tesla Autopilot software update sensitive to hazard lights?

Multiple Teslas using Autopilot have actually struck emergency vehicles. So the automaker’s software update 2021.24.12 appears to have upped the vehicles’ sensitivity to flashing lights. Here’s what the manual says:

“If Model3/ModelY detects lights from an emergency vehicle when using Autosteer at night on a high speed road, the driving speed is automatically reduced and the touchscreen displays a message informing you of the slowdown. You will also hear a chime and see a reminder to keep your hands on the steering wheel. When the light detections pass by or cease to appear, Autopilot resumes your cruising speed. Alternatively, you may tap the accelerator to resume your cruising speed.”

— Tesla Owner’s Manual

One Reddit user who drives a Model 3 shared that the new, rapid deceleration isn’t always safe. “Almost got rear ended twice on I-4 because it THINKS it saw emergency lights. It didn’t. It slammed on the brakes and shows on the screen slowed for emergency lights.”

One commenter to Jeremy’s original post claims hazard lights will fool a Tesla’s Autopilot.

“I think so, it worked in a Model S that was riding my bro like a bike.” That said, the story is completely unconfirmed. There’s no conclusive evidence that the hazard lights on civilian cars actually fool Tesla’s Autopilot system. If it were true, wouldn’t Tesla’s constantly be braking around vehicles with a turn signal on? Even if it does work, there’s no way to know if a Tesla Cybertruck tailgating you is using Autopilot. So this “hazard light hack” certainly isn’t a good substitute for safe driving.