I love They Live, but no fight scene has impressed me more than this one:
One cut, I think it took 6 tries to get it, and over a day to set up the shot each time. If I remember right, on the 4th take, the film ran out just before he busts through the door at the top, they decided to keep going. Another time, Tony saw that the mat was not set out right as he almost tossed someone over the railing.