I finally pulled my summer bike from storage. Oiled the chain and got the tires full of air. I didn't bother checking the quick releases (of course). I'm always diligent when installing a quick release but I had become complacent checking them in between installations.
So here I am downtown waiting at a red light. It turns green and I torque up through the intersection (I like to take the lane and try my best to match pace with vehicle traffic). Midway through the intersection My rear skewer got pulled loose and my wheel actually wedged firmly into my frame forcing my bike to come to a skidding halt. I couldn't pedal or anything and actually had to unmount to get my bike off the road.
I was VERY lucky there were no cars behind me. I notice downtown that cyclists often follow unnecessarily close behind other bikes as well.
Things could have been A LOT worse. I was unlucky to have my tire actually wedge into my frame like that. but I was VERY lucky there was little traffic (as I was late for work already).