The residue of film-wrap appears visible on the grey 'bag'.
It will have been subject to a lot of airflow from the moment of the depressurisation until landing - that could have damaged the film, rather than something inside the bag which is what I feel you are suggesting.
Agreed - I was merely pointing out that there appeared to be film remaining and that indicated that the grey item had originally been wrapped (as suggested as being standard practice for 'loose' items on pallets) and, indeed, that significant 'windflow' would have shredded the film.
No suggestion of anything explosive inside the grey 'bag'.