I actually thought about including this in the post: what is the correlation between ability-to-act and creativity (which is considered to be a right-brain phenomenon, I think)? I've known people who were extremely creative and also very open and able to react. They tend to be performers in theatre or music, and very extroverted. I've also known very creative people who are introverted and shy in person. They tend to be poets or writers. And most of the lifeguard team people I know are quite analytical rather than creative, but they can still have fast reactions.