At first glance, it looks harmless — just an empty plastic bottle sitting on your car’s hood or wedged between the tire and the fender. But according to a terrifying warning that’s now going viral, it’s actually part of a dangerous trick used by car thieves.

Here’s how it works: criminals place a bottle on one side of your car, usually between the front tire and wheel well. When you start to drive away, the bottle makes a loud crackling noise, causing you to stop and step out to investigate.

The moment you leave the driver’s seat — keys still in the ignition, engine running — they strike. One thief jumps in and drives off, while another acts as a lookout. It happens in seconds.

This warning came from a woman who narrowly escaped the trap after noticing the strange bottle before getting into her car. She shared her story online to make sure others don’t fall victim to the same setup.

So if you ever see a plastic bottle on or near your car — don’t touch it right away. Step back, stay alert, and check your surroundings.

Sometimes the simplest object can be a setup. And this one could cost you far more than just your car.