Britain bans hoverboards on streets

British authorities have banned hoverboards -- those two-wheeled, self-balancing scooters shaped like oversized hourglasses.

The Metropolitan Police issued a notice on Twitter on Sunday, declaring them illegal to ride in public because they're considered vehicles, and vehicles can't be driven on sidewalks.

 They're also too dangerous to be taken on main roads, so that option is off limits too.

Riders can only use them on private property with permission, which means malls and corporate complexes have to make their own rules.