Brandon Jennings stops Willy Hernangomez from helping up Rondae Hollis-Jefferson

I’m not sure the exact lesson here. Never help up Rondae Hollis-Jefferson? Never help up a crosstown rival? Never help up any opponent? Whatever it is, Knicks veteran Brandon Jennings taught it to rookie teammate Willy Hernangomez:

Source ProBasketballTalk http://nba.nbcsports.com/2016/11/10/brandon-jennings-stops-willy-hernangomez-from-helping-up-rondae-hollis-jefferson/