"So Cruel" is a song by rock band U2. It is the sixth track on their 1991 album Achtung Baby, concluding side one of the album. The song was written at Elsinore in Dalkey. While audio engineer Flood changed reels to listen to a demo of another song, lead singer Bono began to improvise a song on guitar. The rest of the band quickly joined in, creating the first take of the song. It was developed as an acoustic track, with Flood adding overdubs and additional elements later.