My anaesthesiologist has thoughtfully provided me with a large bag of Fentanyl and push button to give me a top up as required. I don't sleep well in hospital,  so I'm lying here with my mp3 player full of music in one hand and the giggle button in the other listening to Pink Floyd - Comfortably Number struck me as being a suitable track. 

Anyone got any suggestions for other appropriate tracks would also go well with healthy doses of painkillers?