what is this? TWO cards using Grit?
Immediately Alone in the Dark has two uses in a shootout.
1 - hurt their hand. If you can make the Grit, sending a low value / high impact shooter like "Thunder Boy" Nabbe into a pocket dimension bodes well for inflicting casualties on the rest of the dudes, who may not have a plan B.
2 - make losing hurt more. If the obvious shooter on the other side is out of your range (like a Jacqueline Isham) - then you can take the higher percentage spell shot at Grit 3 Rob Wilby and make sure that the casualties that you do inflict ignore the dudes intended to take the bullet.
that option number 1 also goes well with an on value Ricochet, since assembling a hand with weaker bullets might lead to more cheating.