Like _The Belko Experiment_ before it, _Mayhem_ is a cathartic office massacre movie that's mean-spirited in a good way. _Mayhem_ however, has one thing _The Belko Experiment_ didn't: Fellow Australian Samara Weaving lowering the quality of the whole thing. _Final rating:★★½ - Had a lot that appealed to me, didn’t quite work as a whole._