If indeed that viewport collapsed at 4000m as the article suggests, they probably didn't even have time to realize they were dying.
That would imply a collapsing somewhere between the two.
Also, would the body, being mostly made of water itself, really get crushed instantly? I would certainly expect the pressure to squeeze all the air out of your lungs.
I know nothing about how the body behaves under high pressure.
"psi" is pounds per square inch, and a human has ballpark 3000 square inches of surface area.
So to get a (very) rough approximation, picture what would happen if you squeezed a human with 3000*1892 pounds of force. Or try not to picture it, because I imagine it being pretty gross.
Industrial divers / welders / etc get all kinds of training to avoid that stuff, for good reason.
That said, if divers are slowly "eased in" to the high pressure environment, it is actually possible to equalize pressure slowly and acclimatize. Though 1.3km would still likely be beyond the limits of that https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5110125/
Perhaps there might be a hairline crack that makes a window shatter when it's hit with a hammer. Except the hammer impact is constant. I don't think there would have been a lot of time.
Press against a solid object gently with one hand on each side, then suddenly yank away one hand. The object will be accelerated gently. Now do that with all your strength and send the object flying through the room in no time, with a few dozen kg of pressure. Now imagine that you could apply hundreds of tons of pressure. In such a system, every change will be nigh instantaneous.
Failure is going to occur on the order of fractions of a second at those huge pressures. (Fortunately?)
Here's a pressure vessel failing at only 1 bar: