you have your glass up, a/c pumping and your tunes jamming, thinking all is well, thinking perhaps there is nothing better....then another car passes by and you stop hearing your own tunes and start feeling his bassline and singing his song
That moment when the guy in the lime green Civic with the blue underglow, interfooler and "lambo" doors is parked ringing out chune and you pull up unsuspectingly with nothing more than a head unit, a pair of amps and cover him, completely... (sigh) Good times.