Dozens of people gathered at the Harvard Memorial Church Sunday wearing paper masks reading "I can't breathe" to staged a die-in. Harvard Divinity Professor Jonathan L. Walton spoke briefly to the assembled crowd. The Harvard Crimson has a good write up of the event.
It was brutally cold and my hands were freezing while I took these pictures. I'm not sure I would have been able to lie on the pavement for those fifteen minutes without shaking, ruining the whole "die-in" action.