What is "snapshotting"

Usage examples of "snapshotting".

And while she waited, he dragged Jim outside and the door swung shut on Miss Foley and the pink small face with the lenses in it going blink-click, snapshotting two incoherent boys, and them fumbling down the steps in October dark, while the merry-go-round started again in Will’s head, rushing while the leaves in the trees above cracked and fried with wind.

And while she waited, he dragged Jim outside and the door swung shut on Miss Foley and the pink small face with the lenses in it going blink-click, snapshotting two incoherent boys, and them fumbling down the steps in October dark, while the merry-go-round started again in Will's head, rushing while the leaves in the trees above cracked and fried with wind.