The same pentatonics when applied in a chaotic manner creates a different vibe.This sounds like noise emulated on a guitar. This is what I am reaching for here. Some days you want to scratch your balls,the next day eat a steak,fall of a train etc.This is art feel free to do whatever. Even my tongue is out like a Rottweiler but do I care?...NOT.Point being once you learn a few scale positions drag them all over to gain some mechanical facility. Repeat them and make them fit the rhythm and sometimes forget the harmony...occasionally come back and see the way the line and idea will resolve. Its like carrying garbage all day and finally reaching the dumping ground...resolution. So yeah play noise too, Have fun and breathe a little,or in my case wank :)
http://www.youtube.com/watch?v=1BRYr4w7R-0&feature=player_embedded