We Saw That!
Stuntmen don’t get enough credit in showbiz. These guys literally put their lives on the line for the sake of realism. Even if they have a few shattered bones in the process, it’s worth it (to the viewers and director, at least) to produce the most perfect, most realistic shot possible.
It’s just a shame that visible wires can ruin pull viewers out of their immersion. For instance, when the Titanic is beginning to snap in half, one stuntman is pulled into the depths of the Titanic. If you pay close attention, you’ll see the wires the film crew used to pull him down.