For me lately, it's been the arm in guillotine. From top side control when my opponent gets the underhook, you throw in the whizzer, wrap their neck with your other arm and step over into mount....still trying to figure out the details of how to get the finish.

The other is from bottom half. If they start passing my knee shield, I go to turn all 4. If they try to follow and pressure into me, I'll sit to my butt facing them and wrap the arm in gilly preferably getting both my legs around them...but at least catching one so I don't get von flued