Will Smith's sudden and shocking outburst at the Oscars was "triggered by his childhood trauma", a friend of the star has claimed.
The 53-year-old actor issued a grovelling apology to Chris Rock on Tuesday after walking up onto the Academy Awards stage and slapping him live on air.
His Oscar win is now "under review" following his behaviour, which he himself has admitted was "unacceptable and inexcusable.
