I believe there used to be some wrought iron fencing around what was then the admin building. The president used to live in the large house above the amphitheater on the south side of mirror lake. Somewhere I have a photo of guard members hustling down the street toward that house due to a rumor of it being threatened. It was taken from high up in Siebert Hall, my girlfriend's dorm.
I don't remember any bricks being pulled up, but I heard there were students who roamed the steam tunnels long before the time of the riots. I remember piles of rocks stored up under bushes alongside Steeb Hall. The police cars all had big X's of tape on their side windows that were used to keep the glass from flying when they were broken by thrown rocks.