I briefly skimmed thru the post but I tend to disagree as I often do (kidding guys!). I would say that there are too many variables to throw an answer out there.
For example:
1. Is it more than 1 person to worry about?
2. Is it a big person or small person?
3. Is he tall or short?
4. Do you want to disable or harm?
5. What part of him has presented itself?
6. Has he lifted you?
7. etc., etc.
There are too many answers to this question. There are finger/ wrist/ arm locks, several throws that can be done from this posistion. His legs, arms, and goodies can be a target (to break) if so desired. His head/ eyes/ jaw can be attacked, and fun nerve points to strike all around. All fun stuff.
There is nothing so stupid as the educated man if you get him off the thing he was educated in.
-Will Rogers