Gerard Butler dishes on his serious injury on the set of Zack Snyder '300'

Gerard Butler has opened up about a hardship that the cast of the 300 faced while filming.

In an interview with People, the Olympus Has Fallen actor candidly talked about his experience filming the historical-fiction movie.

"I remember every day somebody was getting taken to the hospital," he began by saying.

"You'd be doing a fight, you turn around, there's a guy down there, a spear went in his eye. Another time, you turn around, there's a guy over there who just fell, broke his ankle. I mean, it was insane."

Recalling when he was injured, Butler continued, "I thought I was done. They had to take me out, take me to hospital, put me out, give me the defibrillator. I mean, it was intense."

"And this thing was supposed to stop as he was supposed to slam the brakes. We hit a wall on a rooftop, 3-foot-high wall, full speed, in a Range Rover. It destroyed my neck, and it was after 300. I was already so beaten up in 300."

"And I spent a day filming in the Icelandic Sea, got basically hypothermia there, overheat(ed) once in Montreal doing a movie," the 55-year-old actor added.

Before concluding, Butler shared, "They put wetsuits on us, but then we had to put our whole costume on, and it was 110 degrees. And we were in that all day ... and we're still having to perform so many things."

For those unversed, Zack Snyder's directorial movie 300 had a production budget of $65 million USD and grossed over $400 million worldwide.