[Photoshop] Adding some movement to a still picture
This is quite impressive, and it looks really real

Ohhh... I love photoshop!
Alright, this was the chosen picture for this tutorial...
Lets start with selecting the wheel:
After it's selected, go to: Filters > Blur > Radial Blur , and use the following values:
Repeat this with the other visible whell...
It should be looking like this now:
Going good so far? Hope so... now comes the most boring part of this tut...
Select the entire outline of the care using the Polygonal Lasso Tool and then hit CTRL+I to invert the selection, as the next picture shows:
Now lets get the background a bit of motion... so lets go to: Filter > Blur > Motion blur , and play around with the amount you think that looks good!
Final result:
Nice and easy!
Now go and play with photoshop and show me what you have been doing!