I can use the Pole-arms Skill level 1 attack ability, mash the space-bar and get to use it the next turn again. Only one turn passes for the monsters, but I take n turns (buffs and cool-downs decrease accordingly). Pretty much exactly like the spell-mine bug.
I know that I used to be able to flee from monsters that way, sometimes (seemingly) getting a free movement, if I used the movement key fast enough. I haven't seen that happen in a while though (then again, maybe I'm just getting slower lol).
Oh, I forget what spell this is fun to do with. Deathly Hex, I think? And then just mash spacebar. Gooooood times. Still works. Feels so very cheap.
Yeah, I don't generally use it. Only when there's that one monster on that unreachable island and you just want to kill it without wasting fifteen minutes of your time.