Both victim and killers make arbitrarily stupid decisions just for gratuitous kills and to drag on the plot. Completely destroys all tension or investment in characters surviving or winning. If I know the victims are going to giftwrap themselves to be killed, how am I supposed to care? Beyond that, it's got far too many contrived situations to take it seriously. This movie is full of itself; it's trying to be meta and self-aware about other horror films and cliches but isn't able to deliver on it due to a lack of logical consistency. Matthew Lillard is the only redeeming quality of the film. He's hilarious and takes the facepalming edge out of the more egregious scenes. I suppose it'd be unfair to discredit the actors, but their performances are lost in the bad writing.