Amy Welborn has a post on the worst songs heard at Mass, especially during the Eucharist. After reading it, scroll up for some additions. My husband has heard Bob Dylan's "Blowin' in the Wind" during the Eucharist. I haven't heard anything like this myself, but I will never forget the time St. Matthew's had an African piece with loud bongo drums banging during the Eucharist. I tried to pray and couldn't, it was so loud.