this week's photofriday challenge is motion.

i'm not sure if it's just that i haven't done a photofriday in awhile, but it does seem that it's becoming more and more popular. over 300 entries as i write this. it used to be that i could look through most of the entries during a week, but with the increase in numbers it's not as easy. my favourite of the ones i've seen so far is this one.