[quote name='Jack' timestamp='1349808765' post='1830879']
A lot of Steve's sound is from hitting the strings both really hard and 'down' (in towards the pickups). That way they get that clacky sound, I think they hit the last fret in a similar way to when you slap. Try it, it's easy to do once or twice but you'll spend a lifetime trying to do it every time at that speed.
[/quote]
Nah, just takes strength, endurance, practice, and lowering the action helps (but not too much or you'll choke the notes!)