Everyone remembers the first single.
In 1983, this second single from the second album for Men at Work reached #3 on the Billboard chart. The song, written by lead vocalist Colin Hay (who would later cover it himself).
The song itself is about a guy who has insomnia because he can't stop overthinking everything. I feel personally attacked by these relatable lyrics. For a hit song, it's a little dark, especially since this is the same band who had just smiled and made you a Vegemite sandwich.