Great thread guys.
I'm a Surveyor, I understand the effect of air pressure etc on the travel of particles. We correct for this every day with lasers and distance measurements etc. Lasers are just like a whole lot of little bullets going really fast. The example Gilli has made, along with the survey example, once explained to the wife is the faster and easiest way to move the point of impact of the request to purchase a wind meter from "no way, you spend to much on this shit already" to "whatever, I'm going to sleep!".
This is prefect!
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