TMZ Sports has obtained video of DeMarcus Cousins' devastating ACL injury … showing the NBA superstar screaming and falling to the court after attempting a routine layup.
The 29-year-old L.A. Lakers All-Star was practicing in Las Vegas on Monday … when his knee gave out while driving to the basket.
Cousins could immediately tell something was wrong … letting out a scream as he stumbled to the hardwood. The 6'11" center pointed at his right knee as help rushed over.
The other players are visibly upset as well.