Back, now, at 7:41, with jaw-dropping video of criminals stealing out of cars at gas stations, while you're filling up your tank. It's happening more and more often, and you don't even realize. And... See More
Back, now, at 7:41, with jaw-dropping video of criminals stealing out of cars at gas stations, while you're filling up your tank. It's happening more and more often, and you don't even realize. And they're called sliders. It happens in an instant. Watch as this man snatches a purse in a matter of second. Police call them sliders for the way these gas station thieves slide between the top of your door, lying in wait, for the right moment to pounce and run off with your valuables. And this morning, police say these types of crimes are on the rise. Watch what happens at this texas gas station. This car pulls up next to a woman, who is pumping gas. She is oblivious to the man next to her. He slides into her car, grabbing her purse and running off before she can even blink. She fachases after him, but to no avail. These slippery sliders are being caught on camera all across the country. Sometimes the perp is caught red-handed. This man gives chase, after witnessing a sliding. Most of the time, the victim has no idea until it's too late. They're not looking for a confrontation. They just want the property because they know it's being left abandoned and you're not paying enough attention. Reporter: At this houston gas station, a woman pulls up and walks inside, as the man in the next vehicle, cases her car. When she returns to the pump, then the slider strikes. The woman never realizing she's been robbed. It's very scary that someone can surprise you and steal all of your belongings. It's yours, protect it. And the easiest way to protect it is keep it locked up, keep it with you. And don't leave it in the vehicle unoccupied. As that officer just said, lock your doors or keep your purse by your side. Don't put it on the pump. Don't put it on top of the car. It's too easy to get ripped off.
This transcript has been automatically generated and may not be 100% accurate.