Crumple

When a student makes their framework too small and does not possess peng, their structure will collapse when pressure is applied to it.
This is a failing on two counts:

1. Structure
   - elbows are not kept open and the 90° angle is lost
   - the kwa are closed too far
   - framework is not rounded
   
2. Yielding
   - never allow the opponent to apply more than 4 ounces of pressure to your body
   - never employ more than 4 ounces of pressure
   - to accomplish this requirement, yielding is necessary
   - when a student fails to yield to force, tension occurs and it becomes a battle of strength