to go all the way down to 12,000 feet takes a while. it does not in any way fully simulate the potential chaos that could be going on in that cockpit at the time. >> we're going to stick with you. we have time. so continue on. we'll jump in if we have any questions. he were saying that this would, it provides a lot of stress for the aircraft. >> rapid decompression. some sort of compromise. structural integrity of the aircraft. the last thing you want to do is overspeed the aircraft and worsening that problem. >> what is he doing? >> it will notify you if you're doing that by the alarm system, the indicators onscreen. >> we were talking about when you would do that.