While tapdancer Demi Remick and American Ballet Theater principal dancer James Whiteside go through a dance Remick choreographed, a little boy in the background starts feeling the beat. The dance, called "A Trepok Grows in Brooklyn" (which is an elaborate pun from The Nutcracker Suite) is part of Whiteside's dance benefit video "Fancy Nut Mix"
SOURCE: YouTube at 09:48PM on December 20, 2020