Mac wasn't expecting her to go past him, hoping she'd listen to their plea and let them free, and watches in horror as his squad is attacked. He knows where the two missing squad members went; straight into her gullet. Mac carefully thinks about his options; Shooting her would be pointless and trying to hit her would probably be impossible, but he doesn't rule it out. He feels like he betrayed his squad somehow, maybe it's the small crush he has for her that's making him feel guilty.<br/><br/>Mac rejoins the squad but runs around them, trying to get to Thistle's back while she's distracted. He sneaks up behind her.<br/><br/>"I didn't want to do this..." He whispers into her ear before swinging the butt of his gun at the back of her head, in an attempt to knock her unconscious.