So, boxcars. They’re rare (2.77% chance). They’re almost half the probability than getting a 20 on d20. Yet, no mechanic involves them in DW.
There’s the rare odd move with 12+ result, but I’m talking “natural 12” here, which is lower chances than 12+.
Getting a “critical hit” was always a fun and exciting moment in every single RPG I’ve played. I don’t know a single player who doesn’t cheer and yay when one is rolled.
Last game (first DW game with this group), I had one player who was in a bad spot who rolled 12 and I noticed his excitement was somewhat lessened when he learned there was no extra effect. Sure, I gave him extra narrative power, asking him to describe the awesomeness of his move and told him to make it grand and over the top. It was ok, but I still felt like it would have been cool to tie-in extra mechanical effects.
What do you think? Would it be fun/possible to create a generic move that applies to all moves to grant extra effects to a roll of 12? (because it would be mad to add a boxcar entry for each and every move). Is it desirable? How do you handle this if you go pure narrative?