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.