Those are just mosquito breeding ponds cleverly placed by a vast conspiracy of homicidal drivers consumed by hate for all cyclists, especially those who ride without helmets with that always offensive vehicular entitlement to the lane.
Posters who would distract us with talk of dove tail joints vs box joints vs dowel joints vs locked rabbet joints are obviously in the pay of the car and truck lobby dedicated to covering up the fact that mosquitoes bite cyclists.
All this is well and good for the fortunate riders like Lenny who boast of their vast supplies of helium, but, for the rest of us, West Nile Disease is no light thing.
I could go on. And if this were a proper A&S thread I would go out to quote myself extensively.