An experience I had as an undergrad of walking around a not-yet-bleached spot on the sidewalk in front of Pierce played some role in my not going to grad school.
A concrete surface (such as a sidewalk) needs to be cleaned with a bleaching agent in order to remove bodily fluid stains, which can otherwise persist for years.
They put up a barrier and some "biohazard" signs around the spot, until they had a chance to clean the concrete thoroughly. It would be unseemly for students to trod on the remains of their recently deceased schoolmate.
