I have an eerily accurate internal clock. In high school I repeatedly awoke around two or three second before my alarm clock went off in my washroom. Enough tim

I have an eerily accurate internal clock. In high school I repeatedly awoke around two or three second before my alarm clock went off in my washroom. Enough time to get there and turn it off just as the first beep was starting. Unless I'm sick (or otherwise mentally altered) I know how much time has passed.