A guy wanted to see what it was like filming from inside a guitar. He placed his Phone 4 inside the guitar with the camera on. Here is what the phone recorded.

What a cool idea. According to the post on you tube,

“I just happened upon this trick when testing what it was like filming from inside my guitar.” *Note this effect is due to the rolling shutter, which is non-representative of how strings actually vibrate.

via Bits n Pieces