@Victoria33 
It's after everything settles down that the real adrenaline dump hits and you get what may seem like a massive "sugar rush" to some.
@sneakypete I don't agree with you.  Adrenaline pours in at the moment of danger for quick action required.  When that ends, the body has a let down as the adrenaline stops flowing.  Example:
I can compare it to working as an EMT, which I was.  I responded to medical emergencies on an ambulance until I received my certification, and then in my gated community, responding emergencies before an ambulance got there.  Adrenalin poured into me and my body was stronger than normal, I could lift and move physical items or bodies that were heavier than I could normally lift/move. 
My mind worked at max speed, evaluating the situation/bodies quickly and knowing what to do almost instantly.  Most of the time, in my community emergency response, I had an MCA (Medical Care Assistant) with me to help, to follow my directions.  Looking at me work, one would think I was calm as I wasn't jerky or frantic, but I was centered on the problems mentally and automatically doing what was required to save lives.  There is a mental list of priorities for an EMT to follow and those are drilled into us and are automatically checked off as we work.
Once that was over, I and the MCA were pretty much whipped, out of adrenaline rush, and the MCA and I would go somewhere to recover and calmly go over what happened and discuss if we could have done something differently than we did.  Every emergency was a learning lesson as no two emergencies are exactly alike. 
Your saying adrenalin hits after the emergency, is just wrong.
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