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It's Fun to Play the Piano ... Please Pass It On!
There's not a name for it, it's just some kind of chromatic passagework similar to what you'd find in some of Liszt's writing.
"If we continually try to force a child to do what he is afraid to do, he will become more timid, and will use his brains and energy, not to explore the unknown, but to find ways to avoid the pressures we put on him." (John Holt)