The prey teams are thrown after Luke tells them they will start the hunt with the alarms on their vests blaring. The only way to turn them off is to unite together in the wilderness and figure out the secret code. This puts them all in danger as they must stay together as a group, making it more difficult to hide. The hunt team is thrilled when one of the strongest teams is sabotaged and must wear a high altitude mask for the duration of the hunt, making it difficult for them to see or breathe. (thetvdb.com)