Ok then Xavier attempts to forcefully move Hacker, if he is less then courteous Xavier will cut his legs off to make the task easier on him.
Does that work? 😛
Edit: He will also make sure Hacker knows what will happen if he doesn't comply with Xavier's gestures to move. Make an Intimidation role to help.
"If you don't move, we will cut your legs off to make it easier to move you." Xavier says with a harsh tone in his voice.
Mental torture sounds good to Rand. Locking him up somewhere where he can't lay down or stand up fully, blasting loud music, poking him with our lightsabers when he tries to fall asleep, giving him very meager meals...
Otherwise stripping off lines of skin with Rand's lightsaber should work well too.
This is Intimidation based roll by default? Rand's score is one point better that Gallador's (though Gallador is still a hero for disarming the bomb, I quess).
Unless is there a Lying approach possible, like that we already know more things than we do, and that we are going to spare his life (which I think is worth doing only if he agrees to repay us the favor in the future or if it helps avoiding subsequent attacks).
If we can use Lying, Gallador wants to make a roll (Subterfuge), if only Intimidation I suggest Rand.