Which has a much less 'creepy teacher' vibe about it has been posted a few times over the years
youtu.be/F1qKv-kaYEk
(There are a few mirrors on YT, so easy to miss)
(, Fri 18 Dec 2020, 8:38, Reply)
somehow it reminds me of
www.youtube.com/watch?v=EIyixC9NsLI
(, Sun 20 Dec 2020, 8:25, Reply)