those Ford Falcon sedans in the background suggest an Australian influence ......
.............. an' back then it were cool to have a sissy bar to hold up the backend of yer butt support on yer dragster ....
........................ but only sissys wear'd helmets .........
I dunno .........
..................... I've seen marital become very similar to martial ...........
.......................................... almost experienced it .
I had one but it rolled right over ......
I now use a weather string .... much the same as the rock but also includes air movement indication ...
.. string moving = breeze
.. string horizontal = stronger wind
.. string missing = batten down the hatches; OR thief in local area
A few years ago I recall hearing that a whole Chinese weather bureau got to spend time in tha callaboose for getting their forecasts rather wrong.
Something about monsoons and flooding or some such .....