Being the cynic that I am I reckon that last picture is photoshopped.
For at least 3 reasons really.
1. There is a decided lack of splashing in the water. Contrast pic # 4 with last one
2. Look at the windscreen on the truck in the 2nd to last picture, there is a shadow of a mirror. It is in exactly the same place in the last picture despite the chnage of position of the truck.
3. Whats with all the "smoke/dust" in the last photo? Looks like an attempt to blur edges and details.
oh and 4 I am a cynical b'stard.
Still funny though.
Edited to add...
Look at the background of pic# 5 and the position of the cars/boats and the truck in the water. Now contrast with the last picture in the series....