Inattentional Blindness
The UK's Department of Transport has developed an interactive on-line test demonstrating the distractions that multi-tasking drivers face. Let's just say this: all of you downtown commuters ought to be very happy that I am not driving, chatting on the phone, and counting pedestrians downtown everyday.
Take the test, then share your results in the comments. I'll post mine below the picture.
Ouch! I missed 8 questions and my pedestrian spotting was off by 7. Did you see the hidden oddity?