Don't seek out the movie
I wasn't planning to. Not my kind of film.
That stunt alone caused me to start trying to find out who Dar Robinson was, because seeing that film in a theater on release, I thought he was just another actor. The onscreen death without a stuntman cutaway really surprised me.
I remember Robinson being a pretty famous name at the time, pretty much the highest-profile stuntman in the business for a while. That movie was probably a large part of why. Among other things.
And I guess the term was "decelerator" rather than "descender" as I was calling it. Oops.