Footage of a maintenance worker at a middle school in China destroying cell phones as a warning to students. <br /><br />The video, filmed in Guiyang, Guizhou Province on June 21, shows a man - dressed in the camouflage clothing - using a hammer of some kind to smash the phones in front of all the students in the playground. <br /><br />The school is reportedly under military management and doesn't allow students to use their phones during teaching hours.
