Mace, if you have messed with feeders, then you are familiar with what I was writing about.
At our local auction barn there was a lanky guy who watched for those animals which would actually charge in the ring and goaded them into charging. He would put a foot on their lowered head and vault into the air grabbing an overhead bracing pipe or aiming for the pipe fence between the ring and the buyers. People cheered him...I always thought it extremely dumb to take such risks...but that's the brashness of being around 19 years old. Dunno if he ever made a misstep.
Me, I don't keep eyes on a bull as much as cows...there are more of them. And, two cows can get to pushing and run over me in the process. Beware of a cow who has a calf less than a week old. Given the postpartum hormones, an extremely gentle cow, on occasion, can decide that its human caretaker is a threat to the infant calf and choose fight over flight/docility.
fishheadbob, yep, my cows follow a bucket rattle with cubes very well and they don't have to be extremely close. However, the OP has only one large animal...he needs to be able to approach her, when she is scared for some reason, calm her down, and lead her back home after fence jumping...or into a neighboring pen....he doesn't need her to keep running but to stay close by. That said, it doesn't always work. About 30 years ago I had a calf which managed to escape every time I tried, even climbed vertically out of a trailer top with bars over it. Took to jumping all my fences and into the neighbor's as well, then back. This went on until, at about 1800 lbs, my son and I hunted it down like a deer. I shot it in the head at about 200 yards with a 30-30, winched it onto a flatbed and had it ground into hamburger.