Have you ever fallen asleep and not realized it??

My son does it playing video games or watching a tv show...he stayed up too late the night before. I do it all the time...but, I shattered both bones and my ankle in my left leg...and the meds I'm on...knocks me OUT before I can get to my bed sometimes...lol UGHHHHHH KILLER on my back when I fall asleep at my pc or running for the last minute potty break that should have taken 2 seconds and I wake up 3 hours later!!!!!!!! UGHHHHHHH Once, I fell asleep and woke up as I was falling in the floor...I barely missed my cat litter box....LOL My son heard me fall and scream......OMG laughing so hard now...I told him when he came running in just let me lay here, I think I broke my shoulder....I didn't but, it took me 10 minutes to get up...YES I SHOWERED ANYWAYS........floor is clean, but too close to the kitty box lol.