I hope it knocked a lot more than "some" common sense in you.
We'll be able to tell how much exactly, by the time it takes for me to make another stupid oversight.
Is this an example of Darwinism?
Yes, I survived, therefore I'm the fittest.
Really though, I dunno why I rode and fiddled. I usually stop for such things. It's not like I was doing it the entire 20 min. ride home, so that it was bound to happen. I took it out for a couple seconds to check whether I had a band in there.. Bad luck the guy popped out at the exact same moment, but it may be better it happened early on in my carless career, before I started getting even more courageous with bicycle antics.