Originally Posted by ufobydeath
Side-mount usually... never had anyone catch me with it from mount
I'm assuming it's the far-side arm that they are going for. The arm in front of their face, not the one you put on their hip
With that arm, get an underhook.
So let's say they have you in side control. They are on your left side. They are going to try and get the Americana on your right arm. From here, get an underhook with your right arm.
Not only will this help defend the Americana, but it also gives you an easy escape route. You can push the underhook up, and shrimp your hips out at the same time.
I use this escape a lot. It's kind of obvious once you get the underhook, but it's still useful. At the very least you won't be caught in an Americana anymore.