So you apparently believe that there was a chain saw conveniently located to cut off the head of a dead whale ( I'm surprised they didn't claim he cut the head off a still living one ), and that he knew how to use one. Then the family drove the entire 5 hours without thinking to wrap the head in a bit of plastic to stop the juice flowing into the car ( and apparently the Kennedy car had windows that were unable to close ), and even though other car occupants were "waving" at them, they didn't think to cover it with a piece of cloth or something. Were they they most stupid family on the planet?
BTW, the head of the whale can't have been that big that they were able to lift it onto the car roof, which means that it didn't have enough juice in it to "flow" for 5 hours. The entire body might have, but that wasn't mentioned in the story.
I'm giving this story an FT rating ( for fairy tale ).