Mullholland Drive = wtf?

It is my first Lynch film, though I'm not sure if my brain can take any more of them without exploding. It was very well done, but it was incredibly disjointed and random. I would say that some scenes weren't relevant to the plot just based on the fact that they had characters not ever seen again, but that would presume that I actually found a plot in it, which I didn't. I certainly appreciate movies that leave it up to you to figure parts out, but having no discreet plot is a bit much for me and not having an explanation for a single one of the random elements of the movie is just frustrating. It's a movie I'll probably watch again just to see if I can figure out any part of what is real and what isn't; Lynch has stated that you can figure it out if you pay attention close enough and he even gives some hints that seem as random and meaningless as everything in the movie (I'm saying they seem that way on first viewing, I'm not saying they are).
 
Lynch actually has a terrible secret...he writes the first half of his movies in a coherent manner, then feeds a team of monkeys nothing but cabbage and angel dust, and sets them in front of typewriters. He gives the product to a heroin-addict court stenographer to decipher as best as possible, and makes the result the second half of his film.

NP: In Flames - Black and White

Even he doesn't understand it.
 
Not everything is relevant to the 'plot' jimbob... you have to sit down and think about what IS and what ISN'T part of the grand design...