Space Cannon!

The space cannon would shoot astronauts to the moon from the ocean.

The basic concept behind a space cannon is simple: A hydrogen explosion shoots the payload -- Hunter is concentrating on delivering rocket fuel at first -- up the lengthy tube. The tube's mouth sits just above the surface of the water, and when the payload emerges, it's aimed directly into outer space.

Re-positioning an underwater cannon would be easier than moving one on land, and the sonic boom would be nearly eliminated due to a concept called impedance mismatch, which predicts that over 90 percent of the explosion's ear-deafening sound would be reflected into the atmosphere.

A couple of problems though ...

"I'm not sure where in the world's oceans you'd put it so that the cannon remains aligned," he mused. "Remember, at the exit speeds described, extreme precision of alignment is required, in a variety of wind and water conditions. This would be a very large target, and if placed in international waters -- where you need at least 700-800 meter depth, given the angle of the cannon -- ownership and guardianship is questionable."