Years ago I got a good friend on a bull by running in on them.
We had glassed up a single bull in a big heard of cows. We circled around on them and worked up through the trees, slipping in among cows. Several times we had cows inside of 50 yards of us, it took much longer slipping in on them than we had time for. Finally minutes before the end of shooting light we make it to the opening that most of the herd is in, with the bull. We eased along as much as we could but eventually we had to just break out into a run to make the next little roll and get a shot on the bull.
We had cows flowing all around us, running with them for a few hundred yards, made a good shot on his bull and got it done. It was fun.
It was absolutely "fair chase", it took us 3 hours to ease through all those elk in the trees, but you can get away with a lot with a big herd, if they don't wind you.