Thanks, Nathaniel...
Just holding the camera in my other hand; pretty brave/stupid considering I had that big brown on the end of my line at the time.
For the first minute or so, he just stayed deep & swam circles, slowly, like he didn't know he was hooked; that's when I got that pic.
Luckily, I had put the camera away when he decided to run & jump; had to chase him downriver a ways to land him...