So there's a toy monkey drummer thing... wind it up and... someone dies. A lot. Violently. Like a comedy horror amount of death. It starts at the toy of two boys, and then they have to deal with it as adults. Something something dealing with life, accidents, and death, and what does that mean, and also comedy deaths.
This is a "black" comedy, which I have a bad track record with. It's either comedy so esoteric you can only tell it's supposed to be funny in hindsight. Or... it's just really bad comedy "but that's all right, because it's supposed to be 'black' comedy!" No, that's not a good excuse for bad comedy, and this is comedy that thinks it's funny, but it really isn't.
Not bad performances, with Theo James doing double work as twins, but you can easily tell who is who as one of them wears glasses. Colin O'Brien isn't terrible as the young punk kid, and hey, that's an Elijah Wood cameo!
The effects look fine, the film clearly enjoys showing splatter and gore, but... it again wants to be comedy splatter and gore, but no, just no.
This isn't a terrible movie. It's just not a good one.