University of Michigan students walk out on anti-abortion keynote speaker Kristin Collier

Medical students at the University of Michigan walked out of their White Coat Ceremony in protest Sunday after Dr. Kristin Collier, a known anti-abortion professor, took the stage.

Video of the walkout, which has since gone viral on social media, shows a sea of students in white lab coats stand up en masse and leave the room as Collier begins to give her keynote address.

The clip had already been viewed almost 10 million times on Twitter as of early Monday afternoon.