I assume Windows is inexplicably a typo of QI?
I totally agree. I believe they make some effort to get their facts right, but it's not their highest priority by any stretch. I also suspect they might sometimes leave crucial details on the cutting room floor.
In this instance I get the impression that Sandi actually meant the arms are still swung but just kept straight, like a Minecraft run. But then Bill interpreted it as the arms kept straight and motionless, like that one Seinfeld episode, and Sandi didn't correct him.
I call bullshit. I hate Microsoft as much as the next guy, but this seems fake to me.
Edit: I initially assumed OP created the fake email deliberately for ragebait. But most other people are assuming OP thinks (or thought) this email was real, meaning it's a scam email and OP's friend might be actively falling for the scam. I now agree with this interpretation. Sorry my initial comments were a bit rude.