ok and ok i be an idiot . i should have know that any movie require punctuation in it title ( i. e. . ) be of questionable quality . it be clear that the writer and one mr. gregory gieras and spent minute upon minute research the mean and method use by cavers . this become apparent the moment the soon to be purina bug chow enter the cave . sara and david take a full 3 second to tie off their belay line and then jump into the abyss hardly a method one would expect of prudent cavers . and the dialog be priceless . dirk and sara and owen and you guy go north . jake and zoe and and i will head south . look for an up shaft . copy . copy . copy . do he actually say and copy . be david a wan na be astronaut . what a hoot . but they do find a shaft . . . and the audience get it . the funny part of the movie be the final scene when the caving expert turn out to be explosive expert as well . cave and explosive i wish they would offer these class at my school . i just have to ask while do the actor do their own climbing and or do the climber do their own acting . it hard to tell . if you have an hour or two to kill you might consider watch this or you could do something really entertaining like conduct evolution experiment in your refrigerator .