I always wondered about the water thing. I was always taught since I was a kid that toilet bowls in Australia spin the other way going down. I always knew that if there is an outside influence, the water can go either way, I guess the effect only applys to large masses, like hurricanes?
I too had protest to some of the answers.
Fans, can spin either direction, I know I repair them. They even sell reversible motors, depending on the rotation.
I don't know if 5 lug nuts is standard anymore, since a lot of cars are smaller, and have only 4 lug nuts. Most kids these days might be inclined to answer 4.