How do you catch a hard-to-catch horse?

Dave asked the question in the comment section of my previous entry.  What Adam finally did after the horses were getting a little tired of the game was to go get a bucket of feed.  Why he didn't do that at the beginning, I don't know.  Before he bought Sassy, Tude wasn't so hard to catch; but Sassy is a troublemaker (I have a name for her, but it isn't a very nice name), and when she takes off, Tude follows.  If you watched the video, Sassy is the half-Arabian who holds her tail up in such a fancy way and tosses her lovely head while running, as if she thinks she's the queen of the world.  
Cliff and I just happened to be out when Adam pulled up or he'd have had to chase the horses over forty acres; Cliff hollered at me, "Shut the gate to the lot," and I got it closed in time to shut them in.  
In summer when their bellies are full of grass, they can't be caught even with a feed bucket.  Adam only lives a couple of miles from here, and if I were him I'd come out without the trailer, put them in the small pen where we feed the cows, or in the stall, and then go home and get the trailer.    
The Internet is loaded with advice on how to train horses not to run away when you approach them, which proves it's a common problem.  My first horse ran when she saw a bridle or halter in my hands, and I always had to catch her with a bucket of feed.    
When I first bought Blue, he hadn't been ridden for a long time, and he'd run if he saw me coming at him with a halter.  I took to sitting in a lawn chair in his pen, reading a book and ignoring him.  Once I got him to the point where I could put the halter on him, I'd lead him to the yard to graze.  This was a treat, since he was in a dry lot with no grass.  If we hadn't taken that dry lot out when we brought the trailer house in, Blue would still be alive and well, by the way.  But I digress.  
Later on when he and I were well-acquainted with one another, if he started to trot away, I'd make a hissing sound and twirl the lead rope toward him to make him keep running.  Blue was slightly lazy, and after a very short time he'd get tired of the game; it was no fun to run if it was somebody else's idea.  Eventually he got to the point where if he even took one step away when I was approaching, all I'd have to do was hiss and he'd stop in his tracks.