Elon Musk seems not only intent on burning all the goodwill he earned for trying to help last week’s Thai cave rescue, but rolling around in its ashes, too. In a series of extraordinarily offensive, now deleted tweets, the SpaceX and Tesla CEO called a British diver who participated in last week’s dangerous rescue mission a “pedo guy,” adding in another tweet “bet ya a signed dollar it’s true.” Musk’s tantrum was triggered by an interview the diver, Vern Unsworth, gave CNN International last Friday, in which he called the small submarine Musk had SpaceX engineers build a “PR stunt” and said Musk could stick it “where it hurts.” Though the submarine was intended to help the 12 boys stranded with their soccer coach navigate flooded cave passageways, Unsworth, who helped plan the rescue operation and recruited other cave diving experts, said it “had absolutely no chance of working.” Unworth added that Musk “had no conception of what the cave passage was like.