Tesla has a feature called “full self driving mode,” which allows the car to be operated without a driver. At least, that’s what the name would imply. In reality, someone’s actually gotta be in the car, and in most cases, you’ll find yourself intervening over and over again to prevent minor things like “hitting children.”

That said, there are some places where it seems to work okay. For example, if you’ve parked in a parking lot, you used to be able to “Smart Summon” the car to your location. While this was cool by itself, it was even more fun to use for pranks, as this dude did for this grandma. As the video shows, she wasn’t thrilled.