The extremely easy-to-master skill of being horrible at absolutely everything, ever. To suck at everything, it generally helps if you're a whiney scene kid (or an angsty emo kid). This can go hand-in-hand with failing at life.
Did you see that loser? He completely sucks at everything.
When a bunch of scenesters organize themselves into a group, all running around flailing their arms as if they were having an epileptic seizure while simultaneously acting like a ninja (IE: kickboxing the air).