Marching [upd] - Backwards

In (DCI) competitions, backwards marching is a fundamental skill. Corps members may march backwards for 32 consecutive counts (about 16 seconds at 160 bpm) while playing brass or percussion instruments. Judges specifically evaluate:

: Perhaps the most visible use, where performers must often march away from the audience while keeping their instruments pointed forward to maintain sound volume and quality. backwards marching

Walking backwards is . The brain must: