In the original, Jean put her father to sleep after weakly saying “It’s not me” to him when the walls of the house shook. Now she becomes the Dark Phoenix and kills her father, who abandoned her.
Here’s a clip:
https://drive.google.com/open?id=1L52WC4Q8qC2CyFWBXgM8cFD8GE5VUbrB
or lower quality here:
https://youtu.be/2e2Q9XSY3kA