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anything that you just finished with "all right, good night." sloppy, perhaps. >> i want to go back to this. and here is -- about the pressure in the plane and the altitude. and how would you -- talking about this whole ghost plane scenario. someone, a pilot, sent me this saying how long someone would have to put on their oxygen mask if they were at 35,000 feet. if you're at 15,000 feet, you have 30 minutes or more. is that right? if you're at 18,000 feet, 20 minutes or -- let's see. 20 minutes to 30 minutes. if you're at 22,000 feet, 5 to 10 minutes. then it goes exponentially. usually they fly around 30,000, 35,000 feet? >> you've got to look at first of all what sort of decompression you're talking about. are you talking about a slow leak? are you talking about an explosive decompression? are you talking about a total decompression? in all cases it's very serious as i'm sure bill will explain to us. but once you get above 35,000