Adrenaline is a big part of an anger reaction — the "fight or flight" reaction is a very difficult one to reason ourselves out of once it hits. In addition to giving us quick reactions and additional strength, adrenaline gives us "tunnel vision" — we are only able to think about, or even see, one or maybe two variables at a moment (as opposed to when our conscious minds function normally, and we can juggle 5-7 variables in a situation).
I hope it doesn't sound like I'm just philosophizing (in a non-helpful way) about anger. I have collected these tidbits about anger because it has played a big part in my own life. It is only in the past few years that I can consistently count on myself to act the way I want to, even when "driven to anger." Knowing these things about anger have helped my own self-awareness, which led to much more peaceful behavior on my part.
photo by Karen James