ButTed Lassostar Hannah Waddingham had a particularly traumatizing experience one theHBOdrama.

the Mountain (Hafor Julius Bjornsson).

“Unbelievably, they changed it quite at the last minute.

Game of Thrones

Hannah Waddingham on ‘Game of Thrones’.Helen Sloan/HBO

I thought they’d sent me the wrong bits.”

Apparently they hadn’t, and when Waddingham arrived on set, she was indeed outfitted with a wetsuit.

“They were like, ‘Oh, it’s going to be waterboarding instead,'” she recalled.

“And I was like, ‘But we’re not actually doing waterboarding.’

And they were like, ‘No, no, no, we are.'”

“Lena was uncomfortable pouring liquid in my face for that long, and I was beside myself.

But in those moments, you go, ‘Do you serve the piece and get on with it?’

Or do you chicken out and go, ‘This isn’t what I signed up for.'”

And I was like, ‘Yup, you don’t need to tell me that!'"

HBO did not immediately respond to EW’s request for comment.

Filming the scene had a lingering impact on her.

“It definitely gave me claustrophobia around water,” she said.

Waddingham was driven by the creators’ desire for authenticity and her trust in the production team.

People aren’t going to think that’s enough.

That is not enough retribution for Cersei.