Gerard Butler sees footage of near-fatal surfing accident - watch
The 300 actor appeared on ABC's Good Morning America yesterday (October 22), and was confronted with footage of him being engulfed by two enormous waves during filming of Chasing Mavericks in California last December.
Clip begins at 1:18:
As host Lara Spencer played in the clip, Butler stated: "Nobody's seen this before actually."
He continued: "It was like a tsunami coming in. That's crazy, even when I see it now. Brings back memories.
"I just didn't come back up really. I was down for a long time and I started to think, 'Wow, I'm going to die making a movie'."
Butler became dependent on prescription drugs following the painful accident and completed a three-week rehab stint back in February.
Chasing Mavericks, which Butler has described as a "passion project", is released on October 26 in the US and November 2 in the UK.