Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great action movie!!!

This movie is great. It centers around genetically engineered sharks. When the sharks rebel, all hell breaks loose. The shark gets free, causing the gruesome death of crew member after crew member. It will keep you interested the whole time, and hey, Samuel L. Jackson's in it, so it can't be all bad, right? Just an excellent action-packed thrillride.