Imagine this: You're cruising down the highway late at night getting sleepier and sleepier by the minute. You've had two cups of coffee, you've got the windows down and you're still ready for a snooze. What will prevent you from falling asleep and running off the road?
The Nap Alarm created by Japanese company Takanoha may look like a clunky Bluetooth headset, but it's actually a tiny gadget that prevents you from falling asleep. While I can see no real practical use for this while you're at home, in the office or just hanging out (set your real alarm clock or cell phone, people!) I guess having something like this could be beneficial if you were on the road all the time...and a total geek.
How does it work? First you put the Nap Alarm behind your ear then you drift off to sleep (whether on purpose, or not) and the gadget vibrates as soon as it detects you are starting to snooze. The device measures the speed of head movements in order to determine whether or not the user is falling asleep. I wonder if you'd get zapped every few seconds if you sat down to read with it.
To check out additional images of the Nap Alarm,