D&D Online mocking Maplestory?

[color="#cc8899"]Anti-magic would still cancel the effects of a bag of holding, causing its contents to rupture outward. Even without explosive energy, the masses of Goblin parts would force it to expand outward as far as its hide would allow. Somewhat hindered by extremely powerful stomach acid, but still instantaneous.
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Not necessarily - It could be ruled that the anti magic field simply severs the bags connection to the pocket dimension actually holding the materials, turning it into an ordinary bag for the duration of it's proximity to the field, without altering the contents or the bag itself. Except of course the bag would be vaporized by the acid, while the gate was nullified, leaving no way to re-establish access to the pocket-dimension.

The only time a bag ruptures like that is when one bag is placed into another.

The scenario you described would only be applicable to a lesser bag of holding, which rather than using a pocket dimension has merely augmented the natural storage capacity of a standard sack. Those frankly suck because they can't handle nearly the capacity and still retain a vast majority of the weight so you'd never be able to load them quite that well as the pocket-dimension variety, which physically are just an empty sack that serves as the locus for the prime material side of the conduit.