They tried and it wasn't strong enough. the infinite reflection increased the lasers strength enough to do the job. The mirror trick wasn't just a pretty light show, it was a wayto boost the power
The fact that you can see the beams mean some of the power leaked out of the twin reflections.
Since the mirrors are facing each other, the first laser shot would reflect off the mirror at an angle, and not at the other mirror.
Since the mirrors are facing each other, the first laser shot would reflect off the mirror at an angle, and not at the other mirror.