Mike Rosenberg (aka Passenger) wrote this song about his best friend. He explained to VH1: "We grew up together, we did everything together until we were about 16. I dropped out of school to become a musician, and he went to university. When we meet up, on one level, I know everything about him, but on another level, we're kind of like strangers because we've spent so little time together over the last 10 years."
Angus Young created the distinctive opening guitar part for "Thuderstruck" by playing with all the strings taped up, except the B. He learned the studio trick from his older brother George Young, who was the rhythm guitarist for The Easybeats.