Have you ever wondered how some of the sound effects in the movies are being done? Trust the waterphone. I know you’ve seen this instrument before. It has been played in a wide variety of genres: Rock, Classical, Folk and even Pop . This is the info I dug from the web:

Waterphones are stainless steel and bronze monolithic, one-of-a-kind, acoustic, tonal-friction instruments that utilize water in the interior of their resonators to bend tones and create water echos.

The rods can be played with superball mallets, by hand or with a bow. When the tonal rods are sounded some of the fundamental tones and/or harmonics are sympathetic to the bottom & top diaphragms.

Sounds  very techie to me. But read further here

Or you can watch the actual demostrations here and also here

Visit the waterphone homepage for more pictures and sounds.