The idea came up with a group of divemaster candidates that I taught in Submares, Costa Brava. They were also good friends.
This serves more a fun purpose rather than a real training purpose.
It is suggested to have a friend supervise you and to do it in warm water, in this dive site the water was 30 degrees. It is also suggested to start with 2-4kg more than you would normally use in a regular dive. Distribute said weights between bcd and belt. Use the weight belt to keep the floating parts from surfacing (wetsuit, shoes, etc).
