Wow, I was not aware I was in the presence of a true combat warrior. I capitulate. For those who are not as seasoned here is some information that you can use to "stress inoculate" yourselves.
Adrenal Stress in Crisis
If you are not used to the dump, your hands will shake like you have full blown Parkinsons. Don't let the first time be the time you need your senses the most.
Everyone and their brother knows the fight or flight response, I'm just saying that if your heart actually goes to 200 bpm, you have more issues to worry about than trying to squeeze the trigger.
My heart HAS beat at 200 bpm trying to correct for atrial fibrilation. It's not fun. And it also takes everything out of you.
I've been in situations that required action and also included an adrenaline dump. I didn't feel any pain, that was about the only thing that happened other than time seemed to take forever to pass. Must just've been a fluke though.