Cristina Yang, a highly skilled surgeon on Grey's Anatomy, faced multiple instances where she risked getting fired. Her passion for surgery sometimes led to reckless mistakes, such as breaking HIPAA codes and performing unauthorized surgeries. She also mistreated and bullied her colleagues, creating a hostile work environment. Additionally, Cristina participated in illegal activities, including performing an autopsy without consent and covering up a colleague's hand issues. These actions would likely result in her losing her medical license in real life.