Hey, why isn't this thread stickied? Every time I see something bizarre on my commute, I have to go searching again....

Anyway, for your consideration: I think this was last Thursday, riding though Central Park on my way down to Penn Station. Near Columbus Circle, I see a man standing in the road doing something strange: it looked like he was painting a dark line across the bike lane / jogging lane / parkway. As I got closer it proved he was holding a plastic grocery bag in one hand, and reaching into it with the other and throwing handfulls of some mushy brown stuff on the pavement, making a kind of speed bump. Lucky for me, he had not finished yet, and there were still gaps in the line, so I went through one of those. I was running a little late (as usual) and didn't want to miss my train, so I didn't stop to take his picture or investigate the nature of the brown stuff, but I think it was a natural product of some sort, perhaps made by dogs.