[ot] blow out preventers these may be of interest http://www.drillingahead.com/forum/topics/transocean-deepwater-horizon-1 http://www.marklevinshow.com/Article.asp?id=1790422&spid=32364 on a lighter note and in the category of all kinds of unexpected stuff can happen http://www.youtube.com/watch?v=lqhXz6mVPTM [kamikaze marlin stuck in bop - twice] and don't mind me. http://www.youtube.com/watch?v=avh9BwTVXsI&NR=1 [curious whale] however, this might help explain why not all tests are effective http://www.youtube.com/watch?v=phog9w1n2xM