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1 Erin has side mount on opponent.
2 Arm around head secures neck lapel other arm goes between legs and cups bottom thigh.
3 Erin turns opponent on her side.
4 Erin removes arm from between opponent's thighs.
She helps pass top lapel to the bottom hand that is around opponent's neck.
5 Erin now has a tight grip around opponent's neck.
She then secures the choke further by going under opponent's arm and grabbing her own lapel.
6 Erin's shin then comes up and is placed directly behind opponent's neck.
7 Other shin comes up. (Erin is holding herself up, not sitting on her butt yet.)
8 Erin then sits back. Erin pulls the lapel around opponents neck towards her while shin is pushing against her neck the other way.
9 This puts a very tight choke on opponent. Erin can also transition to an arm bar!