I regularly give boost die for good descriptions of actions the player wants to take, or, especially, good lines and dialogue used with a social skill.
The other night the PCs were interrogating a prisoner, and couldn't get anything out of him (nemesis with ranks in Discipline), and ended up getting a couple of Despair. This meant that, unbeknownst to the players, the NPC's allies had broken free and were about to stage a rescue. Some quick thinking and good initiative rolls allowed the PCs to lock appropriate doors, etc. Meanwhile the nemesis decides to jump on the PC with the biggest gun, getting a triumph and a subsequent knockdown. After a tense few moments, the rest quickly beat the NPC into submission, one with a punch, one with a stun blast.
Finally, the Explorer grabs a loose pistol and puts it to the NPC's head. He has no ranks in Coercion (only 2 green dice), but he says in his best Clint voice "I have no idea what setting this is on, punk, but I don't think it matters much to me."
Boost die and an upgrade for making the table howl...