It’s sad that people are so on edge that this could happen.

WTKR News reported:

Balloon popping caused active shooter alert on college campus

Several law enforcement agencies responded to reports of an active shooter at the University of Michigan main campus in Ann Arbor on Saturday.

Students in Mason Hall talked of running for cover, as police received several reports of shots fired around 4:35 p.m. from inside the building and outside on the Diag.

“We received over 10 phone calls of possible multiple shots in the area,” University of Michigan Division of Public Safety & Security Deputy Chief Melissa Overton said.

A vigil happening nearby remembering the more than 40 people killed in terrorist attacks on a pair of mosques on New Zealand heightened tensions even more.

In the end, police determined that harmless “balloon popping activity” made the sounds mistaken as gunfire.

But that was after the campus and everyone in or around Mason Hall experienced “a traumatic day,” according to Overton.

“So, me and about 50 other people were in a room and we barricaded the doors with tables and chairs,” Taha Syed said.