Speed w/Blurred Background (GoPro)

This is a fun video to watch. Question – how is he getting the blurred background with the in focus car? (starts at 0:15)

via Video Editing Forums: Digital Director – Adobe Premiere, Premiere Elements, and After Effects http://www.videoforums.co.uk/threads/45970-Speed-w-Blurred-Background-(GoPro)?goto=newpost