When I was a kid, I used to love to listen to incredible guitarists like Shawn Lane, Rust Cooley and Buckethead, all players that would simply amaze me with their mind-boggling speed and technical prowess. For some of the really fast passages, I could hear that they were using a legato approach — incorporating an abundance of hammers-ones, pull-offs and finger slides — but I had absolutely no idea how to play the guitar in that way or achieve anywhere near their speed and precision. It sounded like nothing I'd ever heard before, so I always referred to it as "alien guitar."