Scary moment for Paul George on Tuesday night ... he suffered a gnarly knee injury in the Clippers' game against the Thunder -- and his status going forward is now in question.
George hurt the leg in the fourth quarter of the contest against OKC -- as he was coming down from grabbing a rebound.
Broadcast cameras showed when he landed on the court, he awkwardly bumped into Luguentz Dort ... causing his knee to bend backward.
The 32-year-old immediately crumpled to the court in pain.