Sometimes you just need more cowbell.
It is for those times that I wrote this:
groovy -e 's=javax.sound.midi.MidiSystem.synthesizer;s.open();c=s.channels;c.noteOn 56,99;Thread.sleep 99;c.noteOff 96;s.close()'
I do often find myself needing more cowbell, such as when invoking a maven comannd which inevitably downloads the internet, like mvn clean. So get this puppy on your PATH and you can do this:
mvn clean && cowbell
...for an audio cue that tells you the internet has been successfully downloaded with a modicum of funk.