1st and foremost: NEVER scrub with that person again. send in the rotating er resident or medical student to assist the cases. (protect YOUR interns and juniors though)
2nd- depending on your mood and amount of time left in the academic rotation: confront the person in the OR and reassign the blame, or just ignore it and secretly know they are a loser for having to blame someone for stuff
3rd- make it point not to treat your residents like that in the future when you become an attending!