It's an underwater attack caught on video off of the Kona Coast at Keawaiki.
The video shows Rene Umberger on the left side of the screen and two other divers believed to be catching aquarium fish on the right. When one of those two divers noticed that Rene was filming their activity, the diver swims towards her.
"The second he saw me he charged without warning," said Rene.
The video shows the diver ripping Rene's regulator right out her mouth, leaving her with no air to breath. The aquarium ban activist says she dove down to document the event to help show people what reef fish collectors really do. But what they did here to her some 50-feet underwater came at a complete surprise.
"I was completely shocked. My next thought was oh my God, is he going to try and turn off my air but he immediately turned and swam away. He wanted to hurt me. He wanted to seriously hurt me because otherwise he would have went for my camera," said Rene.
Aaron's Dive Shop employee Tamrynn Clegg was just as shocked when we showed her what happened to Rene. She says the other diver's actions were down right dangerous.
"A regulator acts as your life support equipment. It's what is giving you air supply from the tank so that being our of her mouth is going to keep her from breathing," said Tamrynn Clegg.
Luckily, Rene was able to recover her regulator and even though she says it was partially broken, she was able to breath while slowly making her way to the surface. While Rene's dive lasted just six minutes, the shock is a feeling she'll never forget.
"When I surfaced at the boat I said, oh my God, someone just tried to kill me underwater," said Rene.
Umberger says she won't let this event stop her from continuing to document aquarium fish collectors. However, she says she won't put herself in a dangerous situation like that again.
The Department of Land & Natural Resources is investigating the incident.