when i'm trying to hear a track i go into the focus zone. i used to play here all the time. what's the problem you ask?
well, your friends waving their hands in front of your face for five minutes... all the while you not noticing... it's extremely rude when someone shows up to a party to hear you play and you don't even notice they are there. i am a lot better about this now.
but i was at a friend's house here so no harm no foul. (see other post about i love my friends)