Fell down the stairs

This morning while I was getting ready for work. I was walking down the stairs and the next thing I knew I'm on my back sliding down 🤦🏾‍♀️ I don't even know how it happened as I don't even recall slipping or missing a step. It's like I blinked and next thing I knew I was down. The only thing I could mutter was "I fell" my husband comes running down the stairs to come help me. My back took a hit but I felt fine after a few minutes. All I could do was laugh internally bcs what the actual heck was that. I'm glad I fell back and not forward for sure and didn't get hurt bad but idk I just found it funny and couldn't help but laugh at myself. I feel fine overall and don't feel the need to be checked out, but just shocked as idk how I fell.....BUT HAPPY FRIDAY!