GS - the 'cello or violincello to give it its anotomical name is the wooden instrument that you clench between your thighs. In the sessions around Barton sans Hyphens, 'cellos are often filled with lentils and shaken loudly, despite the effort involved, particularly during contemplative and sensitive songs. Only once have I heard the double bass (the larger version that you can hide behind) filled with golf balls to acheive a slightly more robust timbre than the shakey 'cello. On that particular evening, the operator was hospitalised for two weeks for heat exhaustion.

The bodrahahahan on the other hand, is a round drummy thing that you thrash with a stick.

I hope that clears it up.