T. Rex in the Atrium

 T. Rex in the Atrium is a 2010 short film / mock trailer created by students completing a BA (Hons) in Computer Animation at the University of Glamorgan, now the University of South Wales. https://www.youtube.com/watch?v=eA-uAX7CXnU

The short depicts a tyrannosaurus rex breaking into the university atrium, chasing away all the students and eating a girl. After the area has been evacuated, another girl arrives at the ground floor in an elevator and is eaten after accidentally attracting the dinosaur's attention. The dinosaur lets out a roar, scaring one last male student away.