Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Who let the Ninjas out?!

If you only watch one ninja movie all year, this should be the one. It's flawless. The action never stops and the kid who plays Sho Kosugi's son is especially good. He's a kid ninja! There's also a granny ninja! And the two main ninjas engage in some of the best fight scenes ever staged. Add to this a campy sense of humor(one of the Mob enforcers is dressed like Tonto and fights with tomahawks that he pulls from under his vest,and some of the fight scenes involve short funny slapstick bits. And did I mention the granny ninja?) and you have a movie that gives you a tremendous Bang for your entertainment buck.I'm going to say that this is THE definitive ninja film of all time. This is the movie that firmly established the ninja film as a legitimate sub-genre in American film.