Injured Officer Mode allows for the replication of an injury. When the student is shot by the suspect the student will be delivered a shock. The shock will then continue to fire randomly for the rest of the scenario. This causes a continued pain stimulus that the officer must fight through to reach his/her goal.
In this video, the tactical officers are practicing room entries. Watch the officer on the right. As they come through the door they are met by a suspect armed with a gun. The officers fire at the suspect, while the suspect fires back and hits the officer on the right. The officer on the right has to continue to fight through the pain for the rest of the scenario. an armed suspect.