We have done 100,000+ of these try-dive experiences at past BSA National Jamborees since 1989 without any incidents. We conduct them in 4' deep pools. It is a very safe and LOW RISK activity. We have 143 staffers from the US and around the world signed up so far. We need an additional 80 to fill out our team and give everyone enough time off to enjoy the rest of the World Jamboree. For most people this is a once-in-a-lifetime opportunity to experience the world brotherhood of scouting. BTW, the staff fee is lower than the participant.