In this video, an enterprising young man places his phone inside an acoustic guitar, points the camera out of the sound hole, and begins to play. The result is mesmerizing, at first seeming to show ...

Kyle Jones, a guitarist, had the clever idea of recording himself playing guitar from inside his guitar. He didn’t expect to see the guitar strings turn into wacky, wavy and shapely lines. It’s crazy.

There are pages of explanations about what you're seeing here, but first just watch this. Obviously, it's a camera looking at the strings of a guitar from inside of the sound hole. The illusion is ...