Looks like sw on his Palomino gelding (who thinks he's a stud), Benny. I have a problem with that horse, he has never learned to "chill out". However, he's tougher 'n nails and won't quit. He and sw have gotten into it a few times, I think they have reached their understanding between the two of them, but I won't go near Benny.
Here's a pic of them roping at a neighbor's branding last spring: