While the sound of it might be something quite atrocious, if you thrash it loud enough you'll always sound precocious.
That seems to be the mantra of YouTube video remixer Andy Rehfeldt, who has created a heavy metal cover of the Mary Poppins classic Supercalifragilisticexpialidocious full of guitar shreds and guttural growls, with vocals from Sera Hatchett from Mercy Brown.