Molly Marra, a sophomore in the nursing program, reacts after submerging her face in ice water to test the diving reflex during a physiology lab, Tuesday, Oct. 9, 2018, in Weyandt Hall at Indiana University of Pennsylvania in Indiana. Members of her lab group, from center left, Lauren Neubert, Tori Louder and Emily Brewer look on. (Alexandra Wimley/Post-Gazette)