Ever Have Your Skirt Lining Rip All the Way up the Center Back?

Edited  3/26/13 This alteration is now available on video at LearningAlterations.com
The lining on this skirt was really tight. Lining fabric doesn't have any give in it anyway, so this one just split beside the seam. The rip was several inches up from the hem, along the seamline. I had to add fabric to give the girl some room for movement. That is called a gusset.