This is NO April fool at all. In fact quite the opposite and the only 'fools' would be those who don't give this a whirl!!!
This is the other way to work a split chain which Judith and I have been discussing and working on together. The 'Australian' split chain. I've had the cheek to call it that for two reasons.
One, it was 'born' there and
Two, you do sort of turn the chain upside down to work it although you don't really!!!! Least you don't have to stand on your OWN head!!!
The only way you're going to see the advantage of this is to 'do it yourself'!!!!
A good way of teaching this method is, as Judith mentioned, to show new students how to make it on a cabone (curtain) ring - see below a diagram from Judith. I reckon that's a great idea even just to teach yourself!!!!