AC/DC's 1990 album The Razors Edge (a title in search of an apostrophe ) is often cited as a big "comeback" album for the band. Recorded in Vancouver, BC, the album was spectacularly successful, achieving multi-platinum status in several countries. It charted at #2 in the U.S. and #4 in the UK. Singles released included "Moneytalks" and "Thunderstruck". The latter was characterized by its pedal tone laden main riff, which is tabbed here.

According to The Story Of AC/DC: Let There Be Rock, this signature riff was inspired by a studio trick Angus Young learned from his older brother George, a producer whose credits include some AC/DC albums. The technique involved playing a guitar with the strings taped, with the exception of one string (in this case, the B string).

It's hotly debated among guitar-playing AC/DC enthusiasts how this riff is actually played. I detail those various ways on the riff page itself, so I won't get into it here. Suffice to say, you need a pretty good picking hand to play this riff well, although it can be played without using your picking hand barely at all (as Young demonstrates in the official promo video for the song, posted below).

AC/DC - "Thunderstruck"      (A. Young/M. Young)

https://www.angelfire.com/planet/zerofret/annesblog/varriffs.txt