One morning a shadow crossed my window but by the time I looked up it was gone. For several weeks I just missed seeing what it was, but at last I spotted it in time: a man was riding a big tricycle on the sidewalk, right next to my apartment building. The next time I saw him I hopped on my bike to follow him. He rode the sidewalks for 4-5 blocks, obviously afraid of the traffic in the street, until he found a quiet alley to turn south, where I asked him for a photo.
I'm not quite sure how he could see where he was going, with an auto sun shade pulled down right in front of his face, held down by a mop handle clamp, but maybe thats why he was afraid of the cars in the street.