As young children learn new skills, they often seem to forget the skills they already had. For example, a child who is struggling to master potty training will often seem to lose speech skills she had already mastered.
In fact, the child has not forgotten her speech. She is using all her learning abilities on the new skill and putting the old skill on hold for a time. Once the new skill is mastered, the child then exhbits the previous proficiency, and even progress, in the "forgotten" skill.
I could google that to have a reference for you, but I don't feel like it. Trust me. I know it to be true.
Working with Zach as both a teacher and a coach, I am approaching improv from different directions than I ever have before. It is blowing my mind. It is making me feel like I'm forgetting everything I ever learned. I have to remind myself that I have not gotten stupid, I'm just putting the old skills on hold until I learn the new ones.
I look forward to the fun I will be having when I integrate them.