How to disappear completely

That there, that's not me I go where I please I walk through walls I float down the Liffey I'm not here This isn't happening I'm not here, I'm not here In a little while I'll be gone The moment's already passed Yeah, it's gone I'm not here This isn't happening I'm not here, I'm not here Strobe lights and blown speakers Fireworks and hurricanes I'm not here This isn't happening I'm not here, I'm not here....