well all of your guys comments and and opinions help. thank you for puting this into detail for me.this is somthing i wasnt told in ground school and i feel that his should be taught even though it happens very rarely. and to comment on the other post my opinion about the aad is that i think anyone who jumps with out one is not taking there life very serious. anything can happen in the sky and that one little thing is what will save you life.just my opinion not trying to upset anyone who jumps without one but....