I was watching The Hills Have Eyes (2006) and in one scene a zombie is searching to kill someone. In this scene a human and his dog are hiding from the zombie, but the dog unfortunately made some noise.
Suddenly the zombie turned back within seconds when he heard the noise.
But now the man and the dog escaped (it almost looks like they disappeared to me) so fast from the place.
I saw this thing in so many movies, how do characters act so fast in movies?