Occupational hazard, innit? Sometimes you get some bass nerd wanting to know about your rig/bass in excruciating detail (which is really cool, because I'm a bass nerd also), the next you've got some whizzed up idiot berating you because you didn't play their favourite song, and why don't you know it, and call yourself a band etc.
All the while, trying to say "thanks for coming, I need to pack up now..."