Star Wars star Hayden Christensen is hoping he never falls seriously ill after learning hundreds of thousands of sick Americans 'wake up' in the middle of surgery.
In new thriller Awake, the actor plays a millionaire who comes around in the middle of a heart operation but cannot speak or move - and he admits his research terrified him.
He says, "It's known as anaesthetic awareness and there are hundreds of thousands of lawsuits each year that deal with this very thing.
"More people go in for an operation or something where they get put under and they remember it and they experience it.
"They either hear it or they feel something; either way they weren't completely under and it is terrifying apparently.
"I mean, as you could imagine, you're more or less paralysed and you can't do anything about it."
Christensen admits the whole experience of the movie operating room left him worried about his own next hospital visit.
He adds, "We laughed about it all the time because I'm stuck there unable to move, unable to scratch my face if I have an itch.
"There were times I needed to get out of it and sometimes people forget that I'm still there and they'll leave set and I'll be yelling after them, 'Hey, I need to get out!'"