octave rocking
When singers go from a whisper to a roar and back again on one note, like they're trying to break their voice just to make the national anthem feel like a rollercoaster.
"I tried an octave rock at the World Series and my voice came out like a broken kazoo.", @SportsSinger
"The guy at the Super Bowl did an octave rock so hard, the halftime show had to take a break.", @HalftimeHater
My brother did an octave rock during the national anthem and now his voice sounds like a dog that just got hit by a car.", @FamilyLife