This morning I carried my laptop and its charger/power adapter inside my soft-sided brief case. As a result, there was some heft to the load swinging from my left shoulder, and the charger made a hard little lump on the side. As I walked from my car into the office, this hard little lump was repeatedly propelled against my left glute — at JUST the perfect angle and momentum to “massage” the spot that was sore from my Sunday afternoon workout.