Blackbox documented one of the most significant moments of the Brisbane Airport Link project, the entombment of the tunnel boring machines (TBMs) beneath the completed tunnels. After the final breakthrough the two massive reception pits, each 14.5 m wide and 16.5 m deep, were excavated by the Thiess John Holland JV using drill-and-blast methods and rock hammers. Our team captured the entire process as the TBMs were lowered into position using a purpose-built steel bridge structure and six 330-tonne strand jacks, before being fully encased in 2,500 m³ of concrete over a continuous 24-hour operation. The result is a detailed visual record of a complex and rarely seen engineering milestone.