This is the first underwater launch of the BrahMos, the world's fastest cruise missile in operation capable of flying at Mach 3.0. I just like to see it pausing and changing direction in mid-air, like a scene from Robotech. The BrahMos is one of the reasons why aircraft carriers are obsolete.
The Indo-Russian supersonic aircraft carrier killer was tested from an underwater pontoon on the Bay of Bengal on March 20, 2013, but it can be launched from any platform imaginable: Military ships, trucks, aircraft, and submarines. They are now working on a Mach 7 hypersonic BrahMos-II. Tests will start in 2017.