"We spent 10 minutes writing this next song, 10 minutes recording it, 10 minutes mixing it, 10 minutes playing it back and that has nothing to do with why it's called '40'."
- Bono, 1987, introducing the song '40'
did you know
U2 hold the record for the most powerful live sound system of all time. It used over a million watts - capable of killing someone if turned up to full.