How does a guy SING for 4 hours? And not just one night, but a regular basis. I was talking to my uncle, and when Bruce & E Street band had there reuinion tour (a few years ago), he saw them in Calgary, and he did a bit over 4 hours, and walked around the whole arena playing one of his songs. Also, apparently, when he left to get a guitar (or something) he said that the management was kicking him out (after about 3 hours)..... so he stayed for 4. I just don't understand how you can keep your vocals after doing shows of 3+ hours every night.