I use to do this ALL THE TIME when I was relaxed!! I'm doing it now as we speak and it grew my hair tremendously!! What you do is you cowash your hair and then while mine was soaking wet I put in leave in condish, a sealing agent and a light gel for hold and each time I put a product in I scrunched while my head was upside down. you can even plop but i never did because it wasnt popular back then and as time went on each time I did it my hair got curlier and curlier and looked even better as the new growth came in because it had more volume!! it got to the point where I could just wet my hair and it curled up on its own so i didnt have to scrunch as long or sometimes at all