A drill down is a marching compettion between you and the rest of the band. You stand at attention untill given instruction by the drum mayjor. You must follow the drum mayjor's exact comands. Sometimes commands will be given one right after another. If you fail to do so correctly you fall out of line and stand on the side at attention.
Band Ten Hut
It's time for a drill down
Band right face band left fac band left face band about face