You are describing a compromised version of extensor action using PP #1, which gives only the straight left arm and not the other half, which is a pulling on the shaft that you get by using PP #3. As Homer says in 6-B-1-D concerning using PP #3 to effect extensor action, "...improperly executed, it can cause Clubhead Throwaway. In which case, use only the #1 Pressure Point and pull on the left thumb to then hold at least the Left Arm in-line and retain Power Package structural rigidity."