Hammer on and Pull offs at a quick tempo. YOU CAN DO IT! Start slow and work your way up to it. Play this one if you've been working on your bass chops for a bit. Not a lot of parts, but it's quick. Here's a link to the brilliant project I mention that Bjork engineered.
"For a person as obsessed with music as I am, I always hear a song in the back of my head, all the time, and that usually is my own tune. I've done that all my life." -Bjork