Quote from one of the witnesses...classic!
One man told the broadcaster: "The plane was taxiing to the gate and the pilot appeared to cut the right hand turn a little too close and his main, right landing gear was off the tarmac in the mud, sinking.
"I looked out and it was about 8in (20cm) [deep]. They did appear to try to rock it loose."
I wonder what the 'rocking it loose' procedure is in the B777 checklist!?? Perhaps get all the pax on one wing and jump up and down!