We have no idea if the video you’re about to see is legit or not, but it sure does get your attention. If real, your iPhone 3GS might just be water-resistant enough to survive a fairly short dip in a pool. We don’t suggest finding out for yourself, but please do report back if you decide to take the plunge.
The video speaks for itself.
Keep it mind that waterproof cases aren’t hard to come by.