One of my first times out with clipless pedals, I was using my old bike, which looked more like a comfort bike. My chain had come off so I stopped to fix it,or, rather, I made my husband fix it. I tried to get going again in the grass and hadn't shifted into a low enough gear, obviously because the chain was off.
I somehow slipped off the bike and it went down first. I became spectacularly airborn, and landed on top of the bike with the handlebar in my hip. That was every color of the rainbow for a while, and really good entertainment for some folks, including my husband.