These "hoverboard" videos almost never end well.
This one starts out innocently enough, with a little girl on a hoverboard as it goes into a gentle spin.
"I seriously can't stop," the girl cries out as the board spins faster. "I'm serious!"
The other girl moves in to help but instead the hoverboard zooms off and slams the first child into a wall with a thud.
Hey, at least it didn't burst into flames.
Earlier this year, the U.S. Consumer Product Safety Commission said that no hoverboard currently on the market meets its safety standards, according to CNET.
Previously, the commission issued a list of safety instructions aimed at minimizing the device's potential hazards.