very nice, try to get decaps though. A good way of doing this is by contracting your elbow and wrist at the same time in the middle of the neck joint.
If your other arm is holding onto the other side of the body then pull with all your might, like extend that pec, lower the shoulder, etc.
If your other arm is holding onto the other side of the body then pull with all your might, like extend that pec, lower the shoulder, etc.