CACC armbar to coil lock
The coil lock (omoplata) can be a very versatile and useful technique.
Here is one variation that I like to use.
starting from Japanese mount
hook his right arm with your left and grab the top of your right thigh
bring your left leg over his head. Push back with your leg and push with your hips for the Straight armbar
if he manages to slip his arm out...
turn on your right knee and secure his left arm
roll over your right shoulder
secure the position as you roll...
finish with your favorite Coil Lock variation