Apparently, this only sounds scary, but actually isn't: the ElectraFlyer C is a metal moni motoglider that has been fitted with a custom battery pack and now runs entirely on electricity. You know, the kind that stops working when the battery dies. As Wired reports, the one-off debuted at the AirVenture show in Oshkosh, Wisconsin last week.

The plane received its airworthiness certificate in April, the report said. It houses a 5.6 kWh lithium battery with a 1,000-charge lifecycle, and it can be custom fit to various airplane designs (at a maximum weight of 78 pounds).

"Once in the air, the ElectraFlyer C cruises at 70 miles per hour. Top speed is 90 mph and the stall speed is 45," the report said. "The plane can fly for 90 to 120 minutes before the battery needs recharging. When the battery winds down, just plug it into a 110V outlet -- your house is full of them -- and you're good to go in just more than six hours. Bump the voltage to 220 and you're flying again in two hours." The best part? The company estimates that "refueling" the plane with a full charge of the battery will cost, on average, a whopping sixty cents, the report said.

And now for the answer to my concern: Apparently, once the battery drains, you just glide to a stop, since it's a glider. Am I the only person to be worried about this?