Well, the touching of the guy has to be pretty important for the jutsu because on pg 8 where yodaime saves kakashi, Kishimoto made it pretty clear that he was touching the guys foot. It also shows frame by frame of going from Yodaime to the foot to Yodaime and then finally to the guy shocked by Yodaime on page 9. Also, that #18 guy wasnt a bunshin i think. I think it was the real deal because on the Inane translation it says "zoom" on the top right picture which would mean someone was moving pretty quickly (away from the battle possibly) . It looks as though Yodaime just took Kakashi out of it real fast and took him to Rin and Obito.

EDIT: says "zoom" on page 9.