I was very confused by that link calling it a horse chestnut. That is not what I grew up calling a horse chestnut, ie the keratin thing that your farrier trims

I was very confused by that link calling it a horse chestnut. That is not what I grew up calling a horse chestnut, ie the keratin thing that your farrier trims (or you do with a rasp.) Separately, what an absolutely nutty thing to cheat at. Thanks for sharing the video!