I once went to a John Martin concert in Hull and as JM was fumbling his way way through the first joint/song to sychophantic applause a commotion broke out on the front row,more interesting than the concert,it turned out to be a rather noisy husband and wife spat which culminated in the man storming out dragging his wife along while she protested "Well when I asked for tickets for Juan Martin they could have told me it was John Martin!"