This video is nothing short of awesome.
And may or may not have gotten the inspiration from this other awesome video.. 

http://www.youtube.com/results?search_query=cello+battle&oq=cello+battle&aq=f&aqi=g1g-m3&aql=&gs_sm=e&gs_upl=8401l8946l0l9002l6l4l0l0l0l0l206l644l0.3.1l4l0