But, the song that is undeniably one of Metallica's biggest and most popular is "Enter Sandman." Inside Metallica's Blockbuster Song 'Enter Sandman'Metallica wrote "Enter Sandman" to go on their 1991 release, and the famed riff on the song actually came from both guitarist Kirk Hammett and drummer Lars Ulrich. Critical Reaction to 'Enter Sandman'Of course, as with any song, people can interpret "Enter Sandman" and its lyrics as they wish. The Houston Press describes the lyrics, stating, "'Enter Sandman' is all about the liberation of living a life entirely free of fear. The Mix Review also talks about the drums in "Enter Sandman," noting that "as with a lot of the best-selling albums of all time, Metallica’s Black Album has had a lot written about it."