I traveled a few hundred miles today and was perfectly alert while I was doing it, then came home and within 15 minutes was absolutely exhausted - NOT because home is exhausting but because my brain knew I was at a place where being exhausted was okay.
@scalzi your brain is much smarter than mine (this is not news). I need crunchy/salty snacks to stay alert. Apparently “running off the road” scares me less than “getting hungry”.