can get a tune out of a banana skin - with a little help from technology. As promised here, Ewan brought home four ScratchBoards, and - also as promised - I provided the banana skin, having first eaten the banana. The results could have made a suitable soundtrack for a scary movie, and I can authoritatively pronounce that if you roll up the banana skin to which you have attached the crocodile clips which are in turn connected to the ScratchBoard which is connected in its turn to your laptop ... you get lower notes. There. That was worth waiting for, wasn't it?
I believe it's all to do with resistance, and that you don't need to confine yourself to banana skins. What I can tell you is that the skin of a banana - particularly if it was somewhat ripe to begin with - does not last long under such rigorous testing, and soon disintegrates into a particularly smelly, slimy mush.
But it was fun.