Robert Follis teaching a nasty armbar setup!

From side control, get your top knee onto bottom's neck area (whew).  An arm will likely come up to defend even if you do this nicely as I likely will.  With bottom's arm up, take it and armbar that mug.

Armbar Triangled in Front

I like this as it doesn't seem to require a great deal of hip escaping.  Bottom's right leg comes across top's trapped arms (which are in bottom's wrist control).  Bottom's left leg crosses over top's far shoulder.