So I was playing the public Smash Bros. demo and something crazy happened. I pushed the home button after a match and quit the game. i got the "Please wait..." message and the screen faded to black. I closed the 3DS. And a few seconds later, I heard this excruciatingly loud high-pitched buzzing noise. I looked all around the house trying to found out what was making the sound, but everywhere I went the noise stayed the same volume. So I put my 3ds up to my ear and realized that's what it was coming from. I opened the 3DS and found this wonderful screen: Warning: Spoilers inside! And I do not own a Gateway. Smash was downloaded from the eShop. This 3DS is version 8.1.0-19U. The noise continued even with the volume slider all the way down. I had to hold the power button for like 20 seconds to get it to shut off. It boots up fine now but... anyone have any insight about why this happened?