Re: Reminds me of a story
@John Brown (no body),
You are correct, sir.
It's also helpful to bear in mind that many oldsters will have a completely different, but still valid, body of knowledge and experience to draw from. In this particular story, it's very possible that the granny in question was quite used to sewing machines, which use a food pedal to control the speed of the machine. This foot pedal was attached to the sewing machine with an electrical cable, and very much resembled an oversized mouse, so it's not hard to imagine that a neophyte computer user who had decades of sewing experience could get confused.
Still, Vince's story strikes me apocryphal, as I've heard versions of it for decades. But I'm sure the story had to start somewhere!