We all know what it's like to be sitting on the edge of your seat during a particular scene, just waiting to see how our favorite character was going to get out of the life-or-death situation.
It's nerve-wracking, but we can always take a breather and remember that they were never in any real danger. But that's not always the case.
Here are some of the most famous scenes that almost cost stars their lives, but were kept in anyways!
Back To The Future: Part 3
Did you find yourself short of breath while watching this scene? So did Michael J. Fox.
While at first the actor tried to film the scene while standing on a box, it just wasn't convincing enough. He did one take without it, but didn't realize how long the scene would take, and ended up passing out for 30 seconds.
The Wizard of Oz
Sure, by our standard, the Wicked Witch of the West's smoke trick wasn't too impressive, but it was pretty cool special effects at the time.
While it may not have been witchcraft, the smoke effect brought it's own evil. The petroleum in the product caught flame from some sparks and set Margaret Hamilton on fire, giving her severe burns.
There were some hard knocks going back and forth between Sylvester Stallone and Dolph Lundgren, but the last one that landed on 'Rocky' was no act.
Stallone had asked Lundgren to give him all he had for it to look real, and the professional martial artist obliged. Stallone went down, and ended up in intensive care for eight days with a swollen heart!