1 This algorithm is called the right-hand rule.

2 And, according to the right-hand rule, they would be spinning, by our convention, anticlockwise.

3 Well, there is something called the right-hand rule What does the right-hand rule say?

4 And some of them might be spinning clockwise, in which case, according to the right-hand rule we would consider them spin-down.

5 If you walk clockwise, you will see that the surface is to your left or use the right-hand rule.

6 But, what happens is if you try to apply the right-hand rule but exchange the roles of A and B, then you will either injure yourself, or your thumb will end up pointing in the opposite direction.