‘Stranger Things’ Kids Do Some Serious Demo-Dancin' on ‘The Tonight Show’ -- Watch!

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The Stranger Things kids sure know how to "Upside Get Down!"

Finn Wolfhard, Gaten Matarazzo, Caleb McLaughlin and Noah Schnapp joined Jimmy Fallon for a Tonight Show dance-off on Thursday, where they busted some moves based on random dance names inspired by the juggernaut Netflix thriller.

Finally, the host and the four co-stars all got together for an epic finale, "The Upside Get Down," complete with a flipped-perspective camera and some expertly (if loosely) executed choreography.

Watch the clip below to see!

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Clearly, when a party member needs assistance -- in Hawkins, Indiana, or on the dance floor -- the party comes through!

Of course, Wolfhard had some great guidance for how to bust a move. During the interview, the 14-year-old actor demonstrated a pretty hilarious Zac Efron impression from the High School Musical movies.

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Stranger Things 2 is streaming on Netflix now, and recently the cast all had some helpful advice for how to binge-watch the new season!

Watch the video below for more.

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