Primal Scream is a tradition at Harvard University that forms part of the streaking at educational institutions.
[1] The walkways through which students run are lined with spectators and the Harvard University Band plays beforehand to excite the crowd.
[1][5] Thursday, December 11, 2014, at 12:00 midnight marked the first time that students ran the naked lap in a clockwise direction.
The tradition of the naked lap has been to start outside of Hollis Hall and then take off initially running west around the Old Yard, counterclockwise.
However, Black Lives Matter protesters gathered and linked arms just west of Hollis blocking the traditional path.