Ann has told me from time to time that sometimes I do the Indian Head Nod. I thought she was crazy, there is no such thing as Indian Head Nod. I hate to admit it, but I was wrong.
Different cultures have different ways of saying yes or no, with their heads.
Americans nod up and down for yes and side to side for no.
Indian are more complicated. They say yes and no both by side to side movement. Straight side to side means no. But side to side with a little tilt means okay, all right or yes. Watch me and see if you can do it!