In the US, there isn't really a standard way of counting from 1 to 5 on your fingers - numbering the fingers starting with 1 = thumb through 5 = little finger, some people will raise their fingers in the order 1-2-3-4-5; others will go 5-4-3-2-1; still others will go 2-3-4-5-1.
Now, my question: how do people count on their fingers in Japan? I vaguely remember learning that this is more standardized in Japan, but I've forgotten the details.
(I know this isn't a question strictly about the Japanese language, but I would imagine that this is the sort of non-verbal communication that native speakers learn in tandem with the language, so it's kind of tied to it.)