[ZenGum]

Simple really.
The blue truck was driving along the road with the red truck following close behind. The bear was off to the river to eat salmon, and ran across the road between the two trucks, but didn't make it. It was hit by the red truck, and knocked forward, executing a perfect quintuple (and a quarter) somersault with pike, landing neatly in position on the back of the blue truck.

Poor bear, just out for a salmon from the riverbed, and ended up with a pike to a flatbed.