Yes, use the opportunity

Heart beating, you remain by the hole and position yourself to get a good look at a large part of the room.
When else are you going to get a chance like this?

It takes a couple of seconds, then you see Emily stepping in your field of view. She carries her dress, and wears nothing but underwear.
Your hand pushes itself in your pants, closing around your already hardening cock. You know its risky, anyone could enter, but its just to tempting.
Emily steps closer towards the wall and you try to be as silent as possible, while she habgs her dress up in one of her lockers, outside of your point of view.
She steps back inside, and her hand moves behind her back to unclip her bra.
Just seconds away from opening her bra she stops dead in her movement, and so do you.

You, same as her, hear a door opening.