Reapers previously could not jump up a cliff without vision on the high ground, the medic's optical flare was an early game method of enabling reapers to do so. File:D8charge SC2 Icon1.jpg D8 Charge The reaper throws a demolition charge on the ground; two seconds later, it detonates, damaging friendly and hostile ground units and buildings in the vicinity. A red timer bar shows how long until it detonates.The mines deal 30 damage + 30 against armored units and buildings. Mine explosions do not detonate other mines and do not deal damage to burrowed units unless the player can detect them.The mines are very small but visible. They can be hidden by units moving past them. The mines do not take damage.