As described in one of the website:
The basic idea behind panning as a technique is that you pan your camera along in time with the moving subject and end up getting a relatively sharp subject but a blurred background.
This gives the shot a feeling of movement and speed. It’s particularly useful in capturing any fast moving subject whether it be a racing car, running pet, cyclist etc.
Panning seems to work best with moving subjects that are on a relatively straight trajectory which allows you to predict where they’ll be moving to. Objects that are moving side to side are challenging and can result in messy looking shots as the motion blur can be quite erratic.
the machine
and the race started!
the leader
otai rileks ajerr
head to head