722 - Van Halen Eruption 1978

From a technical perspective, Eddie Van Halen's guitar solo, "Eruption", was hugely influential on many guitarists. The cadenza near the end is generally regarded as seminal in the development of fretboard tapping, a virtuosic style of solo guitar playing which became popular in the 1980s. The solo's "dive-bomb" pitches also led to the wide-spread use of bridge tremolo bars.