This morning I set an alarm on my iPhone because I had to be up early. It is so dark out already!
Anyway, I can't recall ever using the alarm on my phone to wake before -- I've used it to remind me of meetings and stuff but that's all.
Well, when it went off this morning it not only chimed at me -- which I expected -- but it also flashed the LED used as a camera flash. I thought it was lightning! Scared the bejesus outta me.