Well I don't think I'll be able to rely on my daughter's poor understanding of physics to keep her out of places I don't want her going... she has used her leg as a lever to get herself off my shoulders for the third time.
My granddaughter is not as thrill-seeking. We have a Spa hot-tub and she rarely goes into the "deep-end" (the center), which is barely chest-deep to her. LOL!