They made a full movie that was boring as hell and realized :
"this movie sucks, how about we trick people into seeing it by shooting a bunch of stuff that ends up having nothing to do with the actual movie, like fake aliens who end up being trick or treaters and a side story about a monkey snapping on camera, and put it in the trailer so people will fill seats before the reviews come in"
This movie was TERRIBLE and for the first time in my life I actually want my money back because I actually feel like I was tricked into watching this garbage.
Oooooooo a sky jelly fish that eats horses !
How will I sleep tonight!
Barf.