Keep back against support, press evenly. Mistakes: Overarching back, uneven press.
Control the movement, avoid overextension. Mistakes: Dropping arms too low, not engaging chest.
Hang from the bar with an overhand grip, spaced just wider than shoulder width.
Pull up by brining your elbows to the back of the hips until chin is level with bar.
Slowly lower back to start position and repeat.
Swinging to get up.
Dropping on the way down.
Uneven grip.