Hi, good old SASless,
I was sure this "pouf" will draw some comments ! but it is exactly what this poor dying Allisons sisters said as their agonising last word ! at least what I heard...maybe, when I try to remember, with a longer sound decreasing f....like "poufffffff"...then came the decreasing "flap flap flap" of the main blades, followed by the "bong-bang-bong-clang" of the bouncing landing with the skid break-down.
It's useless to tell here what I myself said, but it's more or less what everybody uses to say in these kind of circumstance.