Ed-
That's actually a nice primer for beginning MTB skills as well as confirming what we need to do as 'experienced' riders.
Yup. a lot of that stuff I really don't think about anymore, ingrained in the old 'cellular memory'.
It just goes to show that MTB riding various obstacles/situations takes a lot more than madly pedaling/flailing harder/faster. As you describe, lots of finesse and body English.
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"I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.