Bush hog in reverse? Yes.
3 point mounted rotary cutter fits under trees so it’s good for cleaning up edges. Mowing our one field with a grid of trees in it, I probably back up more than I go forward.
Running over saplings with the tractor before the cutter gets there lays them down and sometimes results in a less thorough cut depending on species and soil conditions. If they don’t spring back up well, they don’t get cut as well. Simply backing over saplings; or raising the cutter, backing up, and setting down often results in a more thorough shred.
Backing up steep slopes with no upper exit point allows cutting all the way to the top.
Have heard from some that mowing in reverse with a rotary cutter is hard on it. I kind of think there’s no point in having it if I can’t use it to do what needs doing. Mine does look like it has been abused but it looked like that when my father bought it a few decades ago so not convinced my reverse mowing has been a contributor to its unappealing appearance.