This eyewitness video of a helicopter plunging into the water off the coast of Hawaii is shocking, but maybe even more shocking is that nobody was killed in the violent crash. 

Honolulu's Star-Advertiser newspaper reports that all five passengers aboard the tour helicopter survived the initial crash, although one passenger, a 16-year-old boy, was hospitalized in critical condition, while the four others were taken to the hospital.

The helicopter crashed at around 10:30 a.m. according to the video's YouTube description. It went down in about 10 feet of water near the USS Arizona Memorial visitor center at Pearl Harbor. 

A man who witnessed the crash and told the newspaper that the engine didn't sound right, and that he swam out to the chopper after the crash and took turns with a federal officer going under the murky water to cut through a seatbelt and free one unconscious passenger. 

The helicopter is reportedly owned by Genesis Aviation Helicopter Tours, which offers a 45-minute tour that gives passengers "a rare opportunity to get an aerial perspective of Pearl Harbor's Battleship Row and the hallowed waters surrounding the USS Arizona, according to the company's website.