You don't always need to pick every note, that's why hammar-ons and pull-offs exist. This was just done for fun and taken to the extreme opposite end to show case the hammar-on and pull-off. The only thing I am doing with my picking hand is muting the strings I'm not using, because the volume is turned up very high to allow this to work and I don't want them to be picked up and muddy the noise more (after all, I only record using a phone).
About Joker of Spades Productions
Welcome to the world of recording music with a tiny crate amp in my room using my phone.