Speaking of estimates, I like this one: pi x thumb, There is also pi times door and pi times eye.
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pi is wrong.
Yes, I heard that, but what about 
?
still good, Cap.
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This stuff is mostly beyond me but that makes sense, I guess, must be another half rotation.
In any case I came across this youtube video the other day looking for something else, ended up watching the whole thing. It’s very good.
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