The Avatar actor was horrified by the 1965 creepfest Two on a Guillotine.
But what was the first film to have the actor holding his own breath in terror?
“I believe Cesar Romero is in it.

Stephen Lang, and Connie Stevens in ‘Two on a Guillotine’.David Livingston/Getty Images; Everett Collection
But that scared the living s out of me.
I was in a movie theater when I saw it.
I couldn’t really leave, you know?”
“I don’t go to see horror movies, they scare me,” confesses Lang.
It’s an extraordinary movie.
Watch the trailer forTwo on a Guillotineabove.