INTRO:
"Welcome ladies and gentlemen! This is an experiment. We have been watching you all very closely and know all your likes, dis-likes, friends, foes, hopes, dreams, and most importantly- your worst nightmares.
"Now, as you can see, you are amongst your friends, and family. You are probably wearing the same outfit. If so, then you are on the same team. One of you (on each team) is carrying a stone that matches your team's jacket.
"Now I well bring your attention to the opposite team. Well you can't see them, because they are on the other side of the arena. But they have a stone just like it, only in a different color