Don't Bring Me Down by Electric Lights Orchestra or ELO is one of the most repetitive songs I have ever heard. It's saving grace is that people are mostly focused on who the hell Bruce is in DBMD.
It's actually groos and ELO has said they made up groos for fun, but coincidentally there is a German greeting called something like grus which is a greeting. Fans have wondered if ELO was maybe trying to incorporate the German greeting into DBMD, but it REALLY wouldn't make sense to be like,"Don't bring me down, hi!" If groos was said BEFORE "Don't bring me down is said, then the greeting would fit in more.