Abstract: On May 3, 2013, Employee #1 was dismantling a 4-tier high supported scaffold when a blowout of wet grout occurred and spilled out onto the plank where he was standing. On that day the brick block on the northwest wall of a new 32-ft high gymnasium building was being. The scaffold on the opposite side of the grouting operation is where Employee #1 was dismantling the scaffold so that it could be erected adjacent another wall for the next scheduled pour. As the grout was being pumped into the brick block, a large section of the block blew out spilling approximately 8 cu yds. of wet grout onto the scaffold where Employee #1was standing. The worker was pushed off the scaffold by the spilling grout and fell to the ground. Employee #1 was transported by ambulance to an area medical facility, where he was treated for a fractured ankle and was later released.