This subject has probably been brought up before, but I feel like killing a few minutes so what the hell.
My senior year in college, I told my roomate's dad that I was on the cross county team. He gave me a puzzled look and asked, "you guys don't really run across the country do you?"
Also when I was in college a family friend found out that I had run 10 miles that morning. Their response was " you ran 10 miles!? Are you sure that's even healthy for you to do?"
both equally dumb questions in my book