Way back when - that was thee first song I heard from Metallica.
I was devastated, as a young person, to find out it wasn't their song.
I didn't hear the original till decades later. Original is better. Ha !
I don't like - at all - when bands - in concert - do these song melodies - in one song.
I think ZEP did it once - "The Hunter" - " If You're going to San Fran " but they were masters.
There's just something pure - dreamy - and powerful -
when a song is performed from the very beginning to to glorious end.
To see a short version of " Am I Evil " - in concert - is blasphemous !