You would need a piece of metal long enough to support, of which there are very clearly none even if they remained at their full length. It’s also a massive truck, and I’d dare you to get even just a fast moving motorcycle up there. As for your “it could be moving” comment no it fucking couldn’t. The picture is in focus, the subject well centered, and there’s already a fire truck and burn marks.

What probably happened was some kind of explosion or other damage and someone photoshopped in the truck because it was funny.