Back when we were cavemen, we needed extra strength when killing an animal. We needed the strenght to run faster, thrust a spear harder, throw a rock, tackle game or what have you.

Are bodies were conditioned the get a shot of adrenaline for this extra strength. When it was time to make the kill, this burst of energy was needed.

After all those years, we get a shot of adrenaline when we site game, only now we don't need it. We don't need the extra strength.Today, we have to sit still and not move. But this adrenaline is pumping through our body and not being used. This is what causes the shakes and quivering knees. This causes us to not think clearly. We have a sort of chemical imbalance going on.

Just thought you guys might be interested in where it comes from.