Lia Mizrahi:
Can I use Martial Arts to refresh 3, and does that take a turn?
I'll answer this one first since it's simpler - yes you can do it, no it does not take up your turn. If you were going to attack anyway, put some impressive flavor text on it and take your refresh.
(for anyone who is wondering, this option is available if your Hand-to-Hand or Weapons score is 8 or higher)
Rob Zwartnacht:
What's the penalty to try to disarm someone? Rob's got no more hand to hand pool, so it probably doesn't matter, but going after that stun gun is a priority.
1) +3 difficulty to hit a weapon in hand, so for these guys that give you a target of 6.
2) If you were using a weapon, you definitely get it out of his hand, and possibly damage it. If you were using your own hands, continue to step 3.
3) You and the bad guy immediately enter into a contest of Hand-to-Hand - you both take turns rolling Hand-to-Hand against difficulty 4, and the first one to fail the roll loses the contest. Rolling first put you at a slight disadvantage, and who has to do it is kind of arbitrary - in this instance, I feel like the guy who already has the stun gun will have an easier time holding it then you will taking it from him, so whichever one of you makes the attack will roll first, BUT if your attack roll was a natural 6 then the bad guy has to roll first in the contest instead.
3a) In theory the HtH contest can occur in its own time bubble inside of one combat round, but in this medium that risks making everyone wait days until we resolve it. Instead I will rule that, at least in this instance, each exchange takes a full combat round. Yes, this does mean that other characters (on either side) might get to interfere. And to be clear, making the initial attack to start the grapple
and rolling for the first exchange of the grapple counts as a single turn, both taking place within the same combat round.
4) Once someone fails their HtH roll and loses the grapple, the winner can choose to automatically hit the loser with it (this still takes up their turn, but it's almost definitely a turn well spent).
Hopefully that's all clear, but if you still have any questions let me know.