Trojan Horse incident, Despatch
On 18 April 1985, a municipal truck loaded with branches drove past the Nomathamsanqa Higher Primary School in Despatch, eastern Cape. Scholars were on boycott at the time, but were playing games in the school grounds. The truck was stopped by youth in the street. The driver got out and fired a gun into the air, at which police officers emerged from under the branches and opened fire on the group of youths, hitting six people. Four died and two survived.
Sorry, no references to this term could be found in the tv series transcripts.