Running is fun! Look at Arnold's happy face as he jogs along. Hah! Lest you thing Lisa and I were cheerful around the 1.5 hour mark, be assured that we are fakey-faking it for the cameras.
After a race they send you links to the picture proofs so that you can purchase them if you like. I have yet to see one picture of myself running that doesn't make me want to never, ever run in public again.