Hoverboards: are they just the stuff of viral advertising campaigns, nostalgic merchandise sales and fantasy?
It's hard to say - while the very idea can at times seem ridiculous, there are lots of ways in which a floating skateboard could at least seem feasible, whether it's magnets, powerful air blasters or some other as-yet-unharnessed tech.
But when it comes down to it, are we really just kidding ourselves? Are hoverboards always destined - like jetpacks and zombie plagues - to stay in the realm of sci-fi?
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Luckily SciShow has looked into it. And their conclusions might just surprise you.
Check out whether or not you can reasonably expect to scoot around town in mid-air before you're too old to buy adequate insurance.