It might even be a positive pressure issue.  I don't know.  If you dive deep enough and forget to exhale when you get to the top, all bussup bradah.  Do it enough times and maybe the lungs stretch too much and then fail.  Combine w/ alcohol the night before and diminished inhibitions might be involved.  Anyway, goin Sandys.  My plane is late so one noddah session befoah da freedom bird.  k den.