"You're welcome, and thank you." Grey says as he and Lyra go into the waiting room, one they are inside a projector is projecting on a white screen, it has diagrams showing how to use the lasers.
The first diagram has a picture of a unicorn, "In order for unicorns to use their laser, place a small ring on your horns, and a saddle gun on your back, you should then lightly charge your horn to send a signal to the saddle gun to fire." The second diagram has a pegasus, "Pegasi use a wing gun, it attaches to your right wing and you lightly flex your wing to fire." And lastly, the earth pony, though there were no earth ponies in the room, the projector was programmed to say it, "And lastly, the earth pony, earth ponies stand up on your two back hooves, and use your forehooves to press a button, you should hear a clicking sound that the laser has been fired." After playing these projections a few times it says the rules, "There will be no vulgar language in the past area. Please do not climb on the cover. Galloping is allowed, but please be careful. For unicorns, no using magic, unless you are firing your laser. And for pegasi, no flying, this is to keep things fair. And most importantly, have fun!"