An employee was performing nursing rounds and caregiving activities for patients at the psychiatric unit of the hospital. A patient pulled the fire alarm in an attempt to escape, and threw water on the floor behind him as he was running. The employee ran after the patient, caught him, and brought him back to the unit. The patient became combative and bit the employee's finger and both of them slipped on the water and fell to the floor. Once the patient was secured back in their room, the employee went to the emergency room for a laceration he sustained when the patient bit his finger. The employee was then hospitalized for a heart attack.