So, you may have seen this wonderfully spooky gif, at some point in your time on the internet.
There's a really freaky looking horse-dog thing, but you only see it for a fraction of a second, so you only have time to process the fact that its legs and knees aren't quite working in a way that we're familiar with (maybe it's a bird of some kind?). Shit's spooky, and it's from a movie called
XTRO. The premise is that a kid's father is abducted by aliens, and the only witness to the fact is the kid himself. The mother believes that the father just ran off, and she's moved on with her life, but the kid is certain that someday he's going to be coming back; then he does. The father comes back, but he's a little
different, and he wants to take his son back with him, away from his mother, to wherever it is that he's been.
This movie gets fantastically weird at parts: the father starts altering the son, giving him telekinetic powers that he uses to bring his toys to life, in a sequence that is equal parts creepy and hilarious. And man, this movie is
really, really good! The effects are solid, and the lighting and framing are used in a way that mostly hides their shortcomings. The actors are believable, the central conflict is interesting (it's basically a child custody/divorce drama, which I've never seen done quite like this), and I just fucking love this movie.
Also, if you don't want to take it from me, you can also take the advice of the RedLetterMedia people, who watched this as part of their 'Best of the Worst' series (skip to 20m14s, if the video doesn't go there automatically).