the one i remember is the three blind men feeling it up.
Did you really just say that???
Kokyu ho dosa -- breath method exercise, in YoshinOrc. As others described.
Katate mochi kokyu nage, is a good waza for weapons retention if someone is trying to restrain you from drawing a weapon. Tends to make them hang on. As you begin working on internal stuff, you'll find other ways of making them hang on, and you'll start to understand better why they might.