As with any accident scene, the first priority is safety (for you and the patient ). Therefore the first action is to stop the electrical source.
Secure the accident scene, using guards, or roping off the area, if available
secure the scene
secure the scene
Document the original accident scene before any evidence is moved.
An Operator's first priority if they are involved in an accident with another vessel, is to report the accident. You should do this as soon as possible. This will aid you in getting help to you and the other parties.
If you are talking scene size up, its BSI/Scene Safety - number of patients. If you are talking patient care, it's airway, breathing, circulation (ABCs).
check if you can call for help i guess
true
protect the person or people in danger
You can always call 911.
first responder? EMT? paramedic? Accident Scene Manager?