Two most contagious things in the world A perfect example of enthusiasm Enthusiasm is contagious. So is the lack of it. . I don’t know why I run, I only know these two things, (revealed in a 7-second next Blog ) By jeff noel Retired Disney Institute Keynote Speaker and Prolific Blogger. Five daily, differently-themed personal blogs (about life's 5 big choices) on five interconnected sites. View all of jeff noel's posts.