je ne sais quois? Nuance. Indefinable. ?
The PF said I think "What WAS that". Past tense?
The STALL (WARNING) triggered at .6 second before the exclamation.
It stopped without the cricket, after the PF said what he said.
In .6 second, he senses, and verbalizes "What was That" before the sound stopped?
It is not entirely demonstrable that the PF intended his interrogoratory because he did not know what the warning was. Nor is it certain his exclamation had anything whatever to do with the sound of the Warning.
It is too easy to form 'findings' that satisfy a preconceived theory, methinks.