One of the disadvantages of being tall is that you serve as a walking early warning system for tree limbs growing out over sidewalks. By default, you may find yourself taking on the role of "first responder", arriving on the scene with a pair of loppers to clear the pedestrian lane of pesky impediments. In this particular case, I must have ducked under this limb a hundred times before heeding the call to public service.
Have to say, though, that it makes for a great before and after shot. All our actions should lead to such clear improvements.