It's happened to all of us.
You wake up from a nap you didn't intend to take, glance at the clock, and scream, "Holy shit! I'm late for work!" (Or school, or whatever.) Your heart starts pounding and your brain starts spinning through excuses: "My alarm clock didn't go off." "The bus was late." "I didn't know I was supposed to work today." You get out of bed, consider calling in, think about what lie you're going to give them or if you'll just tell the truth, thinking about how many other times you've been late that week . . .
And then you realize it's still 9 PM, not 9 AM. It's not dark outside at 9 AM. Shit.
Okay, time to go back to bed.