Last Friday was the second time I commuted the whole way to my current workplace by bike. There's a long climb, I'm on the shoulder bike lane that some car decides to park in, and because I am a bad climber I was looking down and didn't look up until I'd almost run into it. I had just enough time to look back and see an approaching car slowing down to let me swerve around the parked car.
Yesterday was the third time commuting and I made sure my head was up the whole way.