Interesting....A Gf L1011 did the same at CDG in approx 1976ish and got bogged down in the grass...attempting a 120degree turn off the runway
as ordered by ATC...known ever after as Dons corner.
It was then found no instruction on taxi turns and aircraft reference points to safely do these or anyother tight turns on narrow runways had been given to any Gf crews.
Maybe this Captain was also placed in harms way by lack of knowledge of how to taxi and turn a widebody.