I've got Buckethead's "Final Wars" stuck in my head. It's weird; I was at a local GameStop, when I spontaneously remembered that really fast part after the initial riff and before that slow part that goes "meedleymeedley meedleymeedley meedleymeedley meedleymeed-le meedleymeedley meedle-meedle-meedle". I couldn't remember what song it was from, so I asked the clerk, who looked at me like I was acting weirder than I normally do when I'm browsing. So, as I was on my way home, I began remembering other parts until i remembered the whole song, plus the name. That happens to me all the time with song with distinctive riffs like "The Trooper" and "Immigrant Song".