Venus Williams' car crash with Jerome Barson and his wife was a bloody, chaotic scene ... according to the frantic 911 call.
TMZ has obtained audio from the 911 call that day, and the witness who first called for emergency services emotionally describes the accident with glass everywhere, and at least one person left badly bleeding from their arm and leg (we're assuming that's Jerome).
She goes on to tell dispatch Venus was able to get out of her car and walk, while the Barsons -- who are elderly -- were badly injured and unable to exit their vehicle.