On June 4, the phrase 'Killdozer Day' becomes a talking point on social media, with people remembering the June 4, 2004 incident in US' Colarado when a welder, Marvin Heemeyer, carried out a two-hour rampage on buildings using a modified bulldozer. The incident stemmed from his disagreement with local authorities. About 13 buildings, including the town hall, were damaged.