وَنُفِخَ فِى ٱلصُّورِ فَصَعِقَ مَن فِى ٱلسَّمَٰوَٰتِ وَمَن فِى ٱلْأَرْضِ إِلَّا مَن شَآءَ ٱللَّهُ ثُمَّ نُفِخَ فِيهِ أُخْرَىٰ فَإِذَا هُمْ قِيَامٌ يَنظُرُونَ
"The trumpet is blown; whoever is in the heavens and on the earth falls senseless — except whom God wills. Then it is blown again; and there they are, standing and looking on."
The two blasts are plainly separated, and thumma is set between them — the particle that conveys an interval.
إِلَّا مَن شَآءَ ٱللَّه — the exception must be recorded: the sentence issues a comprehensive ruling, then adds the exception itself. Who is excepted is not said; various explanations are transmitted in the classical commentaries, none of them is certain knowledge, and I do no more than relay them.
فَإِذَا هُمْ قِيَامٌ يَنظُرُونَ — fa-idhā: in Arabic this is used for what happens all at once. After the second blast no stage at all is described: they are straightway standing and looking on.
The distinction treated in Ghāfir (al-Muʾmin) at 40/68 works here too: man's forming runs by intervals, the coming to pass of the ruling is instantaneous.