This belongs in the News of the Weird (via Fark):
A school custodian's impromptu after-hours karaoke performance prompted a police response when a teacher thought she was being threatened over the loudspeaker.
State police say a teacher at Booth Free School barricaded herself inside a classroom Wednesday when she mistook someone singing a Guns N' Roses song over the public address system for a threat.
...She was working after hours and thought no one else was in the building. Then she heard someone say over the loudspeaker that she was going to die.
What if they were singing this by the Misfits?