Smarter Every Day crew fired a Ruger P95-DC and a revolver in a glass tank filled with water and captured the shots using a high-speed camera recording at 2,200 frames per second.
It will come as no surprise to gun nuts that the pistols did not blow up underwater. Many gun manufacturers test their guns underwater to ensure they do not experience a catastrophic failure.
[ Many thanks to jdun1911 for emailing me the link. ]