Fermi Problem Friday: Cars and Lightning

To hear Al and Betty Perry tell it, they were lucky to survive the direct hit from a lightning bolt that struck their pickup. It's true that it provided for one heck of a dramatic video.  How much danger were they really facing? Judging by the video below, things could have been much worse had Al and Betty chosen to walk or bike (and ended up at the same place at the exact same time, which would have been pretty unlikely of course). Keep an eye in the tree at the very far right to see a graphic...