A British diver who assisted in the rescue operation to free 12 young football players and their coach form flooded caves in Thailand last week has said he is considering legal action against Elon Musk.
In a freakish series of tweets on Sunday, Musk said he would produce a video proving his submarine would have been able to reach the children and in a comment directed at Unsworth, added: "Sorry pedo guy, you really did ask for it".
"Sorry pedo guy, you really did ask for it", Musk wrote, clarifying in a follow-up tweet that he meant "the Brit expat diver" was a pedophile, according to The Washington Post.
"... I challenge this dude to show final rescue video", Musk said, referring to Unsworth.
The tweet, later deleted, sent investors away from Tesla stock and could expose the temperamental rocket scientist to a libel suit. The drop from $318.87 to $307.20 translates into a $2 billion loss from the company's market value, but it could also signal the beginning of the end for Musk, if we're to believe more somber analysts.
The BBC has contacted Mr Musk, via his company Tesla, for comment.
Unsworth said he brought his knowledge about the cave to the rescue mission but added that he had "no idea" what the diving conditions were like because he is not a cave diver.
However, Tesla customers tend to be people with high levels of disposable income who are also concerned about climate change and pollution. In May, Tesla shares suffered a similar plunge after Musk's erratic performance.
What's weird about Musk's tweet is that it came on July 15, a full five days after the boys were rescued.
The interview spread through the weekend - until a Twitter user baited Musk into responding to it, just as he had been lured by another fan into devising his submarine.
Musk followed up his tweet with another saying "Bet ya a signed dollar it's true".
"Yes", Mr Unsworth said when asked if he would consider legal action.
Reuters could not immediately reach Unsworth for comment. The following week, he hung up on the chairman of the National Transportation Safety Board who called to tell him the agency was booting Tesla representatives from the investigation of a fatal crash involving a Model X driver.
Musk has for years said he is proudly, aggressively unfocused - a billionaire known for his visionary ventures in electric cars, underground supertrains, artificial intelligence and space travel.