You can get the same effect of a lens flare with close-detail descriptions, combined with breaks to new paragraphs.
Your slow-motion montage backed by a Gregorian choir can be done with a few technques that all involve repetition.
First is epizeuxis, the repeating of a word for emphasis.
Falling. Falling. Falling. There was nothing to keep Marie from plunging into the rolling river below. She could only hope for a miracle now, that she would come out alive somehow despite a twenty-foot drop into five-foot-deep water.
Then there’s anaphora, where you write a number of phrases with the same words at the beginning.
There were still mages out there living in terror of shining steel armor emblazoned with the Sword of Mercy.
There were still mages out there being forced by desperation into the clutches of demons.
There were mages out there being threatened with Tranquility as punishment for their disobedience, and the threats were being made good upon.
Mages who had attempted to flee, but knew nothing of the outside world and were forced to return to their prison out of need for sustenance and shelter.
Mages who only desired to find the families they were torn from.
Mages who only wanted to see the sun.
This kind of repetition effectively slows the pace of your writing and puts the focus on that small scene. That’s where you get your slow pan. The same repetition also has a subtle musicality to it depending on the words you use. That’s where you get the same vibe as you might get from a Gregorian choir.
For more neat tricks (aka figures of rhetoric) like epizeuxis and anaphora, read THE ELEMENTS OF ELOQUENCE by Mark Forsyth. It’s both educational and delightful, not to mention overflowing with wry wit. Great book.