Just some interesting reading concerning what Ueshiba is supposed to have done.
Aiki News Issue 019 wrote:
Ueshiba: ... Then I let him push me while I was seated. This fellow capable of lifting huge weights huffed and puffed but he could not push me over. After that, I redirected his power away from me and he went flying by. As he fell I pinned him with my index finger and he remained totally immobilized. It was like an adult pinning a baby. Then I suggested that he try again and let him push against my forehead. However, he couldn't move me at all. Then I extended my legs forward and, balancing myself, I lifted my legs off the floor and had him push me. Still he could not move me.
Note that he pins with his index finger.