I guess that's as good an explanation as any, but it beats me just how the hell something like that is supposed to work. I mean, yes, water has a membrane that insects can skate on and so forth, but really only when it's relatively calm - when it's lashin' around in a storm or whatever, functionally speaking, the membrane barely exists. Similarly, if you disrupt it by, say, dropping a rock into it, the membrane may be there, but it doesn't keep the water stable - the rock goes in, the water goes KABWOOSH!, water sprayeth all over the place. And that's NATURE, the great source of the strange and miraculous - even assuming that you were able to duplicate such a membrane under laboratory conditions, I don't see how you'd solve the disruption problem - if you go through the membrane, it may re-seal itself, but a fair amount of the chemicals are inevitably going to gush out past it before it does so - and I don't see why you'd bother with such a complicated means of doing things when a simple airlock mechanism would do the trick just as well. I know, I know, comic book science, but still.