One thing is certain: Amazon has its work cut out for it. As Casey Neistat shows in a clip below, the "hoverboard" market is defined by legions of near-identical models, many of them from tiny companies with no real track record. It's hard to know at a glance whether or not the more expensive boards are any safer than their cheaper counterparts, and they sometimes aren't. Those boards that stay on Amazon should be safe, but it may take a while before the dust settles and it's clear who you can trust.

[Image credit: Christopher Furlong/Getty Images]