DBenitostock/Getty Images A Philadelphia high school denied a student her diploma after she did "The Griddy" at graduation. The student said the principal told her she could not get a diploma because she made the audience laugh. Her family confronted school administrators after the ceremony but were led away by police. An 18-year-old student was "publicly humiliated" when her high school principal refused to give her a diploma at graduation because she did a "lil shimmy" across the stage, her grandmother says.Renee Hadiyah Reid posted a video of her granddaughter, Hafsah Abdur-Rahman, that shows Abdur-Rahman doing the "The Griddy" on the stage before proceeding to accept her diploma.The Griddy is a dance that originated as a football touchdown celebration.Reid said that parents and loved ones were asked not to scream or celebrate when their children's names were announced during the graduation ceremony.