I think today's WAN show is going to be an interesting one.
... Let's just hope it doesn't get copyright striked.
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It's from a movie called body snatchers. Aliens were taking over people's bodies and copying them, creating an alien clone of the person who imitated the original person (thus body snatchers) The pointing and screaming thing is what the clones did when they detected someone who wasn't a clone amongst them. A way of signalling "this person isn't one of us". That was the reference
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Invasion of the Body Snatchers
https://www.imdb.com/title/tt0077745/I still haven't seen the 1978 one all the way through. I've seen the 90s remake a couple of times though. It's one of those movies they put on TV late at night when no one's watchinh.
Body Snatchers
https://www.imdb.com/title/tt0106452/