No, I'm rarely surprised by any vehicles. But then, I wear an Ipod

Actually, reading and realizing all the opinions against riding with earbuds has made think through how I ride. This is not to start an Ipod discussion, this is just my personal experience, and works for me in my particular biking situation. I ended up asking myself - what would I do differently if I could hear cars coming earlier? (I can hear them, just a bit later than without ear buds) And I realized I wouldn't do anything different. I've taught myself to ride as if there is traffic about to pass me at all times, so I check my back before making the slightest maneuver to the left, and often just because.

Again, this is not a post to defend Ipods, but riding like this means I'm never, or at least very very rarely, surprised by quiet cars or other cyclists, and riding in noisy or windy conditions doesn't bother me. I've exchanged the habit of listening without looking for the habit of looking - a lot.