Shaq and Jimmy Fallon play a very silly game with tiny desks and made up words
You can tell The Tonight Show writers liked the idea of Shaquille O'Neal sitting at a very small school desk, and the entire game above got born out of that.
In the clip, Shaq and host Jimmy Fallon play "Trick or Seat", taking turns to give a real or fake definition of a word that their opponent then has to guess. If they get it wrong, they move to a smaller school desk. If they get it right, their opponent moves.
It's the perfect, very silly, mildly entertaining Friday watch.