You guys both need to do your research. First of all, dave wrote it in his pre-metallica teenage band, panic. Then he brought it to metallica, got kicked out, and both bands played it. Metallica shouldn't have, but it is still a good song. Both songs are really good. So metallica-mike, if you don't like megadeth, you obviously need to get your brain checked. And fastphil, don't be trying to sound smart when you don't know simple megadeth facts.