This is hopefully the last image African wildlife image I post from my 2011 trip for some time. I am first heading to Tel Aviv for work and then in a week I'll be in Johannesburg on the way to Botswana for 8 days of safari.
I used f/32 for this image mainly to force the shutter speed low enough to get the motion blur (it was the middle of the day when this image was made). A lot of these motion blur images are just a matter of trying over and over until you get you are happy with.