The trendy notion among some of the world’s best and brightest: The robots are taking over. Tesla’s TSLA, +4.42% Elon Musk is worried about it. So is Microsoft’s MSFT, -1.24% Bill Gates. And professor Stephen Hawking, too.

Time to add another member to the squad.

“ “I’ve seen what’s coming. And it’s a big self-driving truck that’s about to run over this economy. It’s very scary. I think we could have some very dark days ahead.” ” — Antonio Garcia Martinez

Those unsettling words are from a former Facebook FB, -0.89% executive. He talked about the bleak future with BBC Two’s “Secrets of Silicon Valley,” which aired Sunday night in Great Britain.