How to cut crown moulding angles flat (& adding rope lighting)

Crown molding can be cut easily (and far more accurately) while laying flat. Here's a cheat-sheet for FLAT cutting standard 52°/38° crown; these numbers are already marked on most saws:

Cove up (more on the ceiling)~
38.24° miter
25.81° bevel

Cove down (more on the wall)~
31.62° miter
33.86° bevel

[Original description]:
Just a quick look at how you can cut crown mould the easy way. I also show a simple way that you can jazz it up with some mood lighting. Chicks love it.

Post 1/4 million view mandatory description revision:
READ. Because I'm just going to start removing deliberately provocative comments that are not constructive. Lots of arguments about how "there's only one right way to hang crown mold" on this one, and I, being obstinate, accept the challenge. If you are feeling the compulsion to lay the argumentative smack-down on me, don't. Evidence is not in your favor. My defense goes something like this: Crown moulding orientation is governed by a set of arbitrary cultural conventions, and as such, the rules and regulation of its application are superseded by the following statement: "form follows function."

As a person who is competent with respect to design (but not as an authority), I am in possession of the necessary tools to apply my own discretion to its installation. Now you're probably thinking, "that's a bunch of commie liberal bullshit. I been puttin up crown for thirty years," and you may be at least partially correct- but there is still no empirically sound reason that I should have to install it one way or the other. You see, the shape that our present big-box-store crown moulding's design reflects is one of a simplification of various design elements that were found throughout various cultures of the past; it is a mish-mash. It is a cherry-picked collection that reflects only the design of a product that is engineered to sell in heaping quantities. It is selling you the ideas of sophistication, class, and refined taste- in every single lower middle-class vinyl-coated suburban dwelling in America. Reject your cultural quagmire, and learn to evaluate aesthetics for yourself.

I can go on with this if you'd like: I can give you the spiel on proportion and its relationship to our crown's dimensions, how aesthetically appealing it is in this case mathematically, and how that has been modified by the placement of the mounted support trim-board, because the placement of the profile's details no longer appear to be in the same position, but why? Already most of you think that I am pretentious and arrogant, and you're probably right, considering that I openly admit having to dumb-down my content just to communicate with the majority of you. But I have heard every insult in the book by now, and it's become tiresome, so why not just be honest? Hey, if you would still like to argue this point, at least use complete sentences. They're so much easier on my eyes.

In closing: inform yourself, and then decide. But in the process of doing so, spare me (and others) your misinformed tirades in defense of current traditions, which, of course, are maintained by irrational adherence to the old- and not by supporting evidence. It's simply not just upside-down.