Metallian.com is reporting that the members of the defunct punk/metal fusion band EXCEL are considering legal action against METALLICA over the latter's song "Enter Sandman" (Windows Media, Real Audio), which they claim borrows heavily from the EXCEL track "Tapping Into The Emotional Void" (Windows Media, Real Audio)."Tapping Into The Emotional Void" was originally included on EXCEL's "The Joke's On You" LP, which surfaced in 1989 — two years prior to the release of METALLICA's self-titled CD. "Enter Sandman" currently stands as the biggest hit of METALLICA's career, having peaked at No. 16 on the Billboard Hot 100 chart back in August 1991. METALLICA's self-titled "black album" has sold more than 13 million copies in the U.S., according to the Recording Industry Association of America (RIAA).