“This is an aggressive tone. I’m feeling a little threatened right now,” one student can be heard saying on the video as Olmstead rips off his jacket and throws it to the ground, appearing to gear up for a physical altercation.

The professor then becomes more irate when one student approaches him in an attempt to calm him down.

Olmstead is seen in the video shoving the student and starting to threaten the group, urging them to “do something” if they wanted him removed. He then grabs the phone of a student who had been using it to film his awkward behavior and puts it in his back pocket.

With the phone still recording, Olmstead can be heard continuing his tirade, shouting, “Do something.”