WARNING -- "GAME OF THRONES" SPOILERS AHEAD!!!!
Okay. this is pretty amazing ... Arian Foster's home security cams were rolling while he was watching "Game of Thrones" on Sunday ... and his reaction to the ending is AMAZING!!!!
Second warning ... here comes a spoiler!!!
The ex-NFL star was watching the "Battle of Winterfell" on his couch with some friends -- when he jumped up Bran's final showdown with the Night King.
Third and final warning ... big spoiler coming your way!!!!
So, when Arya came out of nowhere LIKE A BOSS to stab that bitch ass ice-faced demon, Foster went crazy!