One way of pinning someone while in Mount position

Keylock/ Americana, Basic Armbar (drill), advanced Armbar, 2 handed cross - collar choke,

Keeping safe when in bottom mount, Basic Elbow escape, Elbow escape (foot hook variation), Elbow escape (foot hook variation), "Drysdale" escape (Gi/ Nogi variations)

Hydraulic, Desperate Elbow escape

Arm and Sleeve, Head hug, Elbow trap,

Armbar defense counter attack, Leg configurations from mounted armbar, Ezekiel choke, Head n' arm choke, Monoplata and Omoplata

Twisted Arm Control, Armbar, Taking the Back, Gift Wrap Choke