That's so incredibly traumatizing!
What if they happened to scare someone with a stronger fight than flight response who attacked instead of cowered?
I was trying to picture how I would react to that and I think in the first scenrio, I might have hurt the little girl. Likely gave her a series of kicks that landed her back in her little hole in the wall.
The second one likely wouldn't have freaked me out too much. I have witnessed far more dead people then I wish to have. I would likely just have waited for the door to open so I could find someone to tell about it. When he reached out his arms, I would have laughed. At least, I think I would have.
I am glad they didn't do it to kids. At least none that they showed.