Complex sentence: He was killed when he got out of his car and ran up the track to warn other drivers about the accident ahead of them- "Geki" could not avoid hitting Fehr and killed him before running into a wall and dying himself.
Split into simpler sentences: He was killed when he got out of his car and ran up the track to warn other drivers about the accident ahead of them. A driver who raced under the name "Geki" could not avoid hitting Fehr and killed him before running into a wall and dying himself.