2 racist 6 feet tall athlete brothers see a black boy alone minding his business
they approach him and order him to get out of his seat as if they own any of the seating at the free public track meet
when he refuses to move from the seat he's entitled to, Austin starts physically grabbing the innocent black boy, as confirmed by multiple witnesses
fearing a beating from a 2 on 1 assault by 2 strong tall athletes, he evens the playing field by pulling a knife and miraculously wins
This is clearly self defense