Have you ever literally fallen asleep before your head hit the pillow?

I have, once. I was 17 and I had snuck out my bedroom window, after dark, one Friday night, to rendezvous with my boyfriend in the woods.
I snuck back in the window at about 4:45 a.m., and crawled into bed. I fell asleep quickly, exhausted, glad the next day was Saturday.
Next thing I know, Mom is shaking me awake It was almost 5:00 a.m. SAY WHAT??
Mom grew up on a farm, and she got this wild hare to give us spoiled, upper class girls a clue of what it was like to work as a farm hand.
She’d made plans with a local farmer to have us pick, as it turns out, beets, and throw them in the back of the truck he was slowly driving down the rows. Only thing was, she hadn’t said a word to us girls about it. Totally blind sided.
Of course, I was trapped. I couldn’t say a word to get myself out of that mess.
I picked and threw beets for about 10 hours, in the blazing hot sun.
Got home that evening, ate dinner, and went to bed. I laid down, and I literally fell asleep before my head hit the pillow. It was weird.
But, I was young then. I probably would have to go the the ER if I tried to pull off something like that today.

So, do you have a story of extreme exhaustion?