Fwiw, the latest info I've received is as follows:
The crew reported at around midnight and deadheaded on the first sector in economy for 4½ hours, getting zero rest, following which they operated the return sector back to Dubai.
They did their first go-around in DXB apparently due to rain on the runway. Standard missed approach.
They then tried another approach but went around again. During that second go-around they accepted a turn. During the turn the Captain evidently dived the aircraft towards the ground at approximately 4000 fpm rate of descent. The descent was arrested at approximately 1200ft AGL (evidently when somewhere overhead Mirdif).
During the recovery, the aircraft nose was pulled hard up generating an 8000 fpm rate of climb.
No doubt endeavouring to level off, a negative G was imposed on the airframe (one that required that the aircraft be grounded for inspection).
They came around for the 3rd approach and landed.
The crew have apparently been suspended.
Evidently, and iaw with the 'advice' from the GCAA, night deadheads have stopped and flight deck are now doing layovers instead. Daytime deadheads still happening but rumour has it they will stop soon too.