A patient at TriStar Summit Medical Center in Hermitage, Tenn., was charged with aggravated assault after police say he cut a security officer at the hospital.

According to WKRN, the 44-year-old patient left his hospital room with an IV still in his arm, and the security officer noticed the man in the hallway and asked him to return to his room.

The patient got angry, picked up a pair of scissors and cut the officer’s arm. The incident was captured on hospital surveillance video.

A recent poll of 3,500 emergency room physicians across the U.S. found that hospital staff are at particular risk of workplace violence. Forty-seven percent of emergency physicians reported having been physically assaulted while at work, and eight in 10 say patient care is being affected by these threats.

Learn more about workplace violence prevention training in healthcare in a free webinar on December 6. Read more and register here.