Is it usual to have more than one response or for them to change as you're processing what is going on?
More than 1 for sure.
For example, the flop response is essentially: animal decides lion is going to eat me, flood the body with opiates, let all muscles go limp and floppy.
If the animal then decides there’s a chance to run? Flop can transition to flight, and a different set of chemicals and body responses flood the system. Same with fight.
The “deer in the headlights” is a freeze response. But after that freeze moment, you very often get a flight response, where they run away.
An animal might be halfway through a fawn response, and suddenly decide they could more effectively fight, or flight.
Same is true for humans.
And to complicate it? The amygdala (our central, least evolved part of the brain) has taken control when we go into those fight/flight responses. Ptsd’ers get that a lot, because our amygdala is overactive (which is a core part of a ptsd diagnosis).
But as we register what’s going on around us, we can slip out of that state, and our frontal lobe can step in again, and make reasoned decisions about how to handle the stressor.
At some point, the frontal lobe
will start functioning again. But when that happens will vary. It’s quite hard to assess, even with the benefit of hindsight.