Not enough lifting of the arms...if the club goes to inside this causes the arms to wrap around the body. In position 2 to 3 of this video lift the
club up with you're right arm (left if you need help)) not the right wrist...don't go any further in the backswing till you can get the club-
head up. One last thing in a flat backswing the left shoulder has a
tendency to get higher you feel it in your right side tilt the left shoulder
down. Practise these position in slow motion...in front...to the side
of a mirror.
