http://www.youtube.com/watch?v=OizxjN-80Sg
This is a demo of the Bassonic SYB-5 bass synth pedal, an effect pedal which lets bassists have almost as much fun as synth players.
via ColBassonic:
playing funky licks on 5-string fretless bass with SYB-5 bass synth pedal
mmmmm. nice