It doesn't involve Ki specifically, nor does it address why you were the one called out..... but I believe if you watch Miss Congeniality, she shows you how to get out of a bearhug via the SING technique (solarplexus, instep, nose & groin)
We did that in my old style and it seemed to work pretty good. We would also grab their leg to throw, but be aware if they don't let go, you are going down with them. Things change when they grab you from behind and ALSO pull you backwards.