That pretty much proves a fall like that can happen to anyone ! 
I've had a few "dufus" falls, but the one that gave me the most style points was early on when I was riding with a small group and we just descended a short steep downhill which was immediately followed by a short steep uphill.
I shifted into my small front ring just as I started to go up (I hadn't yet figured out the concept of using my momentum to power me up the next hill). I'm going up the hill, peddaling like a demon, wondering why I was slowing down so much.
It wasn't until I came to a complete stop, pointing uphill, feet still spinning like mad, that it occurred to me my chain had falled off.
I had just enough time to unclip my right foot. So of course I then tipped over to the left. It all happened in slow motion so I had enough time to yell "tim-ber!" on my way down.
But the best part is, since I was on an uphill, when I tipped over and landed on the fleshy part of my hip, I kept rolling and when I came to a stop I was on my back with my bike on top of me, one foot still clipped in and the tires pointing to the sky.
Once we all realized that I was completely unhurt we all cracked up. Too bad no-one had a camera.
2009 Lynskey R230 Houseblend - Brooks Team Pro
2007 Rivendell Bleriot - Rivet Pearl