Re: Workshop with Mike Sigman on Ki in Aikido
If I understood Mike correctly, he wanted uke to make a "solid" grab so as to allow nage to get a feel for the connection between uke's and nage's centers, and then be able to affect uke's center. Usually the grab had to be "stiff" but with a small force, not at all with the intent of actually overpowering nage, but just to connect. Whenever Mike went around and grabbed you, he was very gentle, but the connection was right there.
Somebody asked "what if uke's grab is limp?" and Mike's answer was along the lines of "then I step on their foot".