Furthermore, how could such eruption (in Pompeii) had killed so many but some remained 'frozen' in such positions, complete with their clothing intact (as seen in the BBC's documentary, and said to be 'never seen before or since'), as if they were eternal, while in Herculaneum (which was closer to Vesuvius) only skeletons and skulls remained.

While in physics theory, a 600 Celcius degrees heat from volcano eruption would perish humans onto ashes right away. What would be the mystery behind the frozen figures left in the Pompeii ruins? Don't you think it should be burnt onto ashes instead of remaining a complete form of human bodies?

It was said that the heat was 500 Celcius degrees when it reached Herculaneum that burnt the human bodies and boiled the human brains there, but cooled down to 250-300 Celcius degrees when it reached Pompeii that didn't burn the people but froze them instead. While the distance between Vesuvius to Herculaneum and Vesuvius to Pompeii was within 10 KM away and the materials from the volcano could come in just few minutes. Could the temperature fall few hundreds degrees in just minutes count?

The scientists and archaeologists in Pompeii ruins said the people could have died from suffocated of the ashes and debris instead because of the heat. It was the fourth pyroclastic surge (burning cloud) that finally swept life away from Pompeii. I would say that this mystery of Pompeii ruins is actually odd, given the circumstances, with all the facts and history told. 

via wikipedia

The documentary said it 300 individuals were found around the site of Herculaneum in form of skeletons and skulls. But if you think more about it, isn't it strange that the remains in Herculaneum could differ from the ones in Pompeii, in form of full-bodied plaster casts? And why is it only some of the frozen figures were found where there were 20,000 inhabitants of Pompeii lived at the time? If the disaster could make some people 'eternal', why didn't it do the same to the rest of them?

As a believer I notice that disasters could happen only by the permission of God to abolish the people of one city or area that are no longer please God (remember Sodom & Gomorrah or the great flood with Noah's ark?) But lately I discover that disasters could also be a decoy to cover up the concealment of one (or more) civilization(s). It happened to Atlantis when Mount Krakatau (and Mount Tambora) erupted in 1883, so it could be the same with Pompeii, only 1800 years earlier.

I will leave this post here unanswered, because only God could answer this kind of question. But one thing I want to say here: Pompeii was known as a sophisticated and majestic city at its time. It has a symbol of eternity (the frozen people) that is always found in other missing great civilizations (such as Shangri-La with its fountain of youth). I would just say that Pompeii could be one of the city perished by God's rage for its crimes and sins, or, one of the hidden great civilizations, as the other Nuswantaran kingdoms (read more about it here).

Below is another movie from BBC, more to the stories of what could've happened in Pompeii on its last day. I saw this one years ago, but it's a nice thing to refresh mind and watch it one more time. Enjoy!