This is the GREATEST reaction to Damian Lillard's game-winning shot Tuesday night -- his sister storming the court while screaming "That's my brother" ... and she got the whole thing on video!!!
LaNae Lillard was sitting courtside at the Moda Center in Portland to watch the Trail Blazers take on the OKC Thunder in Game 5 of their NBA playoff series.
And, almost like she KNEW Dame was gonna sink that buzzer-beater, she busted out her phone and began recording the whole thing to her IG story.
Dame shot. Dame scored.