U know..... thinking about this a lil deeper a toilet would flush in the direction the bowl jets are facing. The bowl jets initiate the swirl so with that said a toilet flush can be manipulated. A test would have to be done on a tub of standing water where u pull a plug and let whatever happens happen. As far at cyclons typhoons and hurricanes. .... the upper and lower hemispheres dictate spin. Thats a scientific fact.