Related: is there any rule that stops a panther's Pounce action from knocking prone a Large/Huge creature that fails its saving throw?

— (((Jackson Bockus))) (@wackojacko1138) September 13, 2017

There is no general rule about creature size and the prone condition. Particular game effects say if size is relevant. #DnD https://t.co/AKVl7RkXkN

— Jeremy Crawford (@JeremyECrawford) September 13, 2017