Turn up the heat

It's already a fairly hot day, and you move away from Emma for a while to find the AC controls. It doesn't take much to make them short circuit, cutting off the air supply.

Of course, a prank like this takes a while to come to fruition, so you once again idly float around the library for a while, before eventually returning to the front desk, finding Emma sat there looking highly uncomfortable.

Sweat is practically dripping from her face as she tugs uncomfortably at her jumper, it won't take too much effort to get her to remove it now. As you think that you look around at the three or four others all equally uncomfortable in the building.