It happens when I'm driving a lot...the human body is so bizarre

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Sometimes When I’m about to fall asleep or, more specifically, when I haven’t slept in 24+ hours and am fighting dozing off. Idk why, busy specifically that situation triggers it every time. I noticed it starting when I was in my early teens as a lot of the time before a long flight, like US to UK, I wouldn’t sleep the night before so I could get to sleep as soon as we got where we were going and essentially “skip” lag.

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