I had this come up in a game I ran last week. The player in question is the Battlebabe, with sword in hand (custom weapon, handle+long blade).
She's rushing through a crowd towards a scene in a marketplace where a fight is taking place. We know that someone else (an NPC) is rushing to get out of the fight, with machete in hand.
I'm the MC, the Battlebabe is about to break out of the crowd into the clearing (where the fight is taking place). It's my turn to talk, so I make a move: I describe how, as the Battlebabe pushes aside the last person in her way, she's face to face with someone running towards her, machete in the air, ready to hack her to pieces in order to get out.
"What do you do?" I ask. The player says, "I run the fucker through with my sword!"
--"You're not concerned that she's going to chop you with that machete?"
--"Well, I hope to avoid that--by getting her first, being faster--but it's more important to me that I run her through."
Here, I wasn't entirely sure what to do.
Trading harm for harm seemed like the obvious choice, but also not a terribly interesting one. It would be nice to roll some dice, so as to give room for the move to snowball, and I wanted to disclaim responsibility.
Acting under fire could work, too, with the fire being the incoming machete. However, would a success be just about avoiding this blow, or about running this opponent through? There's quite a difference there.
Seize by force seemed very mechanically appropriate (the outcomes fit the situation), but it's not clear what, if anything, is being seized here.
Worse yet, we all know that the difference between those last two moves was HUGE: the Battlebabe, after all, has cool+3 and a really really lousy hard score.
I found that situation very difficult. In the end, I chose to be a fan of the character, asked her to act under fire, and had her run through the enemy on a success.
Any other angles on this situation? Other ways of thinking about the outcome, and which move to choose?