"The first two records had a sort of cinema sound, a cinematic Panavision feel, the broad, big sound we wanted for U2. Now that we've done the cinema sound, I'd like to make it a bit rougher."
- Bono, 1982
wist je dat
The lyric "3:33 when the numbers fell off the clock face" from Unknown Caller is a reference to the Bible verse Jeremiah 33:3. Bono refers to it as "God's phone number".