To address the OP's question with regard to the Intimidation factor of this particular variant of The Fastball Special, I would use spin generated by the roll as my base, and go from there. Now keep in mind that I'd look at the Ogre's total Stress, plus what he could absorb with his Mild, Medium, Severe and Extreme Consequences, before being Taken Out (2+4+6+8=20, plus 5 Stress to allow for high-end Endurance, though not Inhuman Toughness) would give you a +1 for Spin.
Of course I have had a sniper actually cause sufficient Stress to deal an Extreme Consequence, in one attack.