At my first IDPA match I watched an . . . interesting scenario. The shooter starts at P1, moves forward five paces, turns 90 degrees left down a corridor, then shoots, next returns back through the corridor, then moves uprange to his original position. (Think of an upside-down L; go out, then return on your same path.)
There were targets to be engaged when going in both directions?
The SO should anticipate the direction of movement - one of the things I like about "shoot it only one way" IDPA courses of fire, the SO knows where the shooter is going - and neither get in the way, nor end-up downrange of the muzzle.