So this afternoon I'm sitting in my office. I use a Siri command on my Apple Watch Series 0 to turn my light in my office on, and right after that (like the same second), my 3:55pm meeting alarm went off. It crashed my Watch. Sort of. I got an Apple logo, but the Watch was still showing connected to the iPhone, so I'm guessing it was a respring of sorts. However, while it was showing the Apple logo on the screen, I pressed and held the long power button on the side of the Watch, and it this crazy siren sound played - quite loud, from the Watch. I let go of the button and the siren stopped. I pressed the button again and the siren sound started once again. What on earth? Eventually it just loaded back up fine from the Apple logo. Does anyone know what this siren sound is?