what you want to watch out for: the pipes and any electricity in the outer walls of the enclosure. If using a recip saw, be careful and possible use the short blade so damage to the outer wall is minimized. Consider using a Roto-zip with the cut off wheel and set the depth to the depth of the shower enclosure thickness.
I, again, would watch out for the pipes, electricity, the drain area, and your eyes and lungs when doing this. Consider making a tent with poly and confine this demo to the inside of the tent.