Could be orchestrated as a series of flashbacks. We see the end of the world as confusing, ground-level black and white images.
“There I was minding my own business when this hovering bastard flew down the corridor at me like the devil hisself!” the young soldier in quarantine was obviously quite traumatized, his retelling the details leading to his current condition had been feverish and disjointed up to this point.
He did achieve frightening clarity every time he discussed his assailant.
“The floor shook, the lights trembled and flickered, I swear it!”
His skin had the telltale silvery patches indicating first stage smart dust infection, he kept subconsciously scratching at them.
“That’s not the weirdest part. He split into three on his way to my post!”
Stress and trauma could account for some of the statements, but with the presentation of smart dust infection the possibility of cohesive floating decoys was considered.
“I tried to shoot, to do something. Anything. How did he move that fast? All three of him we’re on me before I.”
He trailed off, at every interview he trailed off at this point.
It was ascribed to the mind trying to forget the trauma, to write in something more acceptable.
All interviews beyond this point noted how the tone shifted as if switching from memory to reading from notes.