I'll bite. I have an interview next week which involves a scenario, so this will be good for me:
(The following is Scenarioland for my province. Real life is waaaaay faster, but I think the OP was talking about a scenario which is a different beast. Your state/province/planet may have different protocols but I'm very confident that the below is correct for where I work)
Anyway.
* BSI precautions and check the time
* Scene survey - any fire, wire, water, gas or glass?
* Broad mechanism of injury? Ask bystanders what happened.
* Is this my only patient? Confirm with bystanders.
* Do I need any specialised equipment? Call for backup. Scenarioland is Fire, police, ALS, BLS and 24,000 of each

* Get closer and look at you patient:
* Are their eyes open and tracking?
* What's their skin colour and condition like?
* Do they seem to be in any respiratory distress?
* Do they seem to have any obvious fractures, dislocations, or deadly bleeds?
* Partner goes over and holds C-spine for manual spinal motion restriction
* available EMS goes over and deals with the deadly bleed. They do this in the following order:
Direct pressure, if that fails:
Pressure point, if that fails:
Pressure dressing, if that fails:
Elevation, if that fails:
Tourniquet (preferably after calling medical director at EMR level) and write on the pt.s forehead "T
time"
* Now me again, I check LOC, finding Unresponsive
* Available EMS brings over a backboard and places it next to the patient
* Check posterior for DCAPBTLS and palpate for TIC
(we're only allowed to roll the patient once in Scenarioland)
* Using appropriate number of people, roll the pt. onto the backboard
* Airway: Dude holding the head does a modified jaw thrust and I check for blockages. If clear, size and fit for and OPA adjunct (after having checked the eyelashes for a flicker indicating a gag reflex - if gag reflex found fit and NPA assuming no signs of skull fractures)
* Breathing: O2 provided by available EMS using appropriate method (BVM, NRB whatever) at appropriate flowrate (15lpm in my world)
* Circulation: what's their pulse?
* rapid wet check
* check skin colour, condition and temperature with back of ungloved hand
* critical intervention check
* continue...
There we go. My interview is in the bag