The billionaire chief executive of SpaceX and Tesla Motors was apparently responding to criticism from Vernon Unsworth, who accused Musk of creating a miniature submarine to rescue the boys as a "PR stunt" during an interview with CNN.
"It had absolutely no chance of working". They had no conception of what the cave passage was like. The submarine, I believe, was about five-foot-six long, rigid, so it wouldn't have gone round corners or round any obstacles.
Mr Unsworth said Mr Musk's efforts to help rescue the boys was just a "PR stunt".
Elon Musk waded into last week's cave rescue of a Thai youth soccer team, tossing off impressively science-y sounding rescue tips on Twitter and showing up at the mouth of the cave, "kid-sized" submarine in tow.
"Never saw this British expat guy who lives in Thailand (sus) at any point when we were in the caves", Musk tweeted.
From there his comments got more freaky, as he called Unsworth a "pedo guy".
Elon Musk called a hero British cave diver who criticized him a "pedo guy". He was the one who helped pinpoint exactly where the boys were within the cave complex.
Unsworth was part of an worldwide team of cave-diving experts who rescued the group of 12 teenage boys and their coach last week.
The "Wild Boars" football team is recovering in hospital after 18 days spent inside the Tham Luang cave, which it entered on June 23 before getting trapped by monsoon floodwaters. "We designed the mini-sub to Stanton's specifications *and* brought a flexible rescue pod just in case".
Another one of the divers who helped rescue the boys, Australian diver Craig Challen, told ABC.net.au that he didn't know if everyone would make it out alive.
In a series of tweets Sunday morning, Musk referred to Unsworth as a "pedo", requested video of the cave rescue, retracted that request, then promised proof that his submarine could have, in fact, performed the rescue.