Side Angle Pose
Utthita Parsvakonasana
From Warrior two, take the back hand to hip, front forearm to thigh or fingertips to the inside of the front foot. Stack the front knee over ankle and wrap the front sitting bone down. Open the torso, rotating it skywards and extend the upper arm over ear.
A block can be used by placing it on the inside of the front foot. Notice if your lower ribcage is collapsing. If so, back off a stage and return the forearm to the thigh. Remember, function over form.