Possible origin of the infamous 5min fight scene
Just rewatched Arthur Penn's 1962 'The Miracle Worker', and there's a long 'fight scene' between Anne Bancroft and Patty Duke's characters that feels very similar in tone and length to the 5 min fight scene between Nada and Frank in 'They Live'.
https://www.youtube.com/watch?v=crV5q2j9DBI
Both fight scenes are about 5 min long and feel ridiculously long, both feature wrestling moves as well as use of the environment to hurt the other, and the stakes in both scenes are similar (to get the other to understand something about the nature of the world: put the Hoffman lenses on and see the world for what it is / understand that words stand for objects in the world).
Carpenter being the cinephile that he is, would no doubt have seen this two oscar winning film...