A Russian state television channel has been left red-faced after filming a showcase of a pioneering robot which turned out to be a man in a suit.
They also noticed that a person would have fitted inside the "robot" perfectly... BBC reports that in a pic shared on social media, the person's neck was visible from inside the robot costume.
The forum was mainly targeted at children and youths, though it has not been established if any of them thought the "robot" was real for even an instant.
The android - known as Boris - had been lauded on the state-owned broadcaster Russia-24 as a technological breakthrough with the ability to walk, talk and dance.
It then emerged "Boris" was in actual fact a 250,000 rouble (£2,975) costume called Alyosha the Robot, made by a company called Show Robots.
As the "machine" danced on stage, a presenter had said: "At the forum there's the opportunity to see state-of-the-art robots". It is said to create the "near total illusion that before you stands a real robot".More news: Congress drafts compromise Farm Bill, eliminates SNAP work requirements
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The event's organizers did not claim that the android was anything other than a man in a suit, according to local reports, so it is not clear why the state television station chose to do so.
"It's entirely possible one of these [students] could dedicate himself to robotics", an anchor reported.
"I know mathematics well but I also want to learn to draw", Boris responded, before dancing to the Little Big song Skibidi.
Footage of the robot reportedly disappeared briefly from Russia-24's YouTube channel on Wednesday morning but it came back again a short while later.
The man turned out to be Belarusian, and told RFE/RL he was "totally ashamed" for taking part in the report.