Was trying to keep out of this conversation but gave up! I agree with DT. This thread has not much point other than a lot of what ifs. During a loss of control of a flight or depressurisation etc you will be incapable of moving from your seat, the lockers would be impossible to get to, attaching the chute less probable, getting to-opening-exiting a door of an out of control airliner travelling at around 500mph would at best lead you to be first in line at the Pearly Gates. You then wud be gutted if the flight then regains control and lands successfully! As instructing in flight safety and flight accident investigation you be better off taking a book, sit back, relax and enjoy yr flight. The dangerous part is over.......getting to the airport. Fact!