I do think the "to the front, side, or back." is extremely relevant and will correct that.
As far as the rest, a little help here.
I want to keep with the basics and not try to be the TS, so I must need to include the factors of "normally, usually and occasionally" and then state at the beginning that there are always exceptions to every rule so this is only meant as a general guideline and not a standard for EVERYTHING. Only meant to give a head start in understanding. Unless defined specifically please consult other more thorough and complete sources. My intention was to not be overwhelming or potentially pretentious.