If the number of victims at the scene exceeds the ability to provide assistance to them at the same time, it becomes necessary to triage the victims. First, help those who are in serious condition, then others. If the casualties include people who are only slightly injured and are able to walk on their own, ask them to step aside and wait while you provide assistance to those who need it most. In a situation requiring casualty triage, it can sometimes be difficult to make the right decision. Use your common sense and do what you think is best.