Steve Irwin's final words have been revealed by the only man who witnessed the fatal accident that killed the Australian wildlife expert. Cameraman Justin Lyons opened up about Irwin's final words during an appearance on television show 'Studio 10'. Lyons recalled how they were about eight days into a shoot for a documentary called 'Ocean's Deadliest' in 2006. On the day of Irwin's death, they had been looking for tiger sharks, but ran into a dangerous stingray.

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Lyons said he and Irwin began shooting the stingray in chest-deep water. After a couple of minutes, the two stood up and decided to shoot one last shot of Irwin getting behind the stingray. 

"All of a sudden, it propped on its front and started stabbing wildly with its tail, hundreds of strikes within a few seconds," Lyons said. "It probably thought Steve's shadow was a tiger shark, which feeds on them very regularly, so it started attacking."

Lyons said he wasn't aware of the gravity of the situation until he panned the camera back to Irwin, who was standing in a pool of blood. The stingray's barb had gone through his chest.

"He thought it had punctured his lung, and he stood up and screamed, 'It's punctured me lung!'"

The team immediately threw Irwin back onto their inflatable boat and Lyons began performing CPR for over an hour. Medics later pronounced him dead. 

He just sort of calmly looked at me and said, 'I'm dying,'" Lyons said of Steve Irwin's final words.

"He was so good with animals. Nothing was going to get him," the cameraman added.  "We thought he was going to live forever."

More: how Steve Irwin's daughter fell victim to a death hoax.