GRAND FORKS, N.D. (AP) — Explicit rules against explicit dance moves sent students at a Grand Forks high school waltzing out of the gym Friday night.

Red River Principal Kris Arason says students are told at the beginning of every school year what kind of behavior is expected in class and at school activities. He says the dancing Friday night was inappropriate.

The Grand Forks Herald reports that students were warned during the dance about moves mimicking one made infamous by singer Miley Cyrus during the recent televised MTV Video Music Awards.

About three-fourths of the students left, despite paying $5 a ticket. They reassembled on the far side of town to dance as they pleased. Police say nothing illegal happened.

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