Didn't the heat of the extremis make the ironman armor freeze up during the movie? My husband pointed it out to me after the first time we watched it and the 2nd time we saw it it was clear as day. Doesn't matter much even if the terminator is working at 100% the hot hands of Killian was cutting threw ironman armor like a hot knife threw butter and being in a dojo I'm sure Killian can get is hands on him. Also Killian had high durability surviving an ironman armor incasing him and detonating. Iron mans blasts only just pushed him back rather than did relevant damage, I don't see the TX not getting damaged by iron mans repulsors.