The unruly boy soon cleared off when a bystander threatened to call the police.

当一个观者威胁说要去叫警察时，那闹事的男孩马上溜走了。

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Mr Cope, from Accrington, told magistrates the pupil was often unruly and that the boy had slammed his head into his hand during a hysterical outburst.

BBC: Prosecution of deputy head teacher Royden Cope defended