Yeah, kind of like that. The weird cat sheep thing. I dont know about the Dream Theater song but Steve Vai does it a lot in Erotic Nightmares, and its not harmonics or anything, I figured that out.
I found a way to mimick it by putting a wah wah pedal in the down position and using a thimble on my right hand (use a slide, you cant shred but it'll work to) to sound notes right up by the lead pickup. I'd still like to know how they do it though.