I ran over a garter snake once that I thought was a stick. I was afraid to look to see if I really hit the poor thing. I sent bf back to look for it, and was gone, so I guess it was okay.

Another time, I ran over what I thought was a stick, and it was a rusty piece of metal. Yeah, I flatted.

Oh, and someone else here ran over a stick (that WAS a stick), and it caught in her wheel, and she went over the handlebars. So, one more reason not to run over a stick.