Instruct: Classify Amazon reviews into positive or negative sentiment
Query: potential gone flat

I got this flick because I had a coupon for Redbox. I'm glad I didn't pay full price for it anywhere.The movie started off interesting enough...for about the first ten minutes, then pffft.I ended up fast forwarding through a lot of the film, then finally getting to the end only to be left seriously hanging. No explanations. Nada. It could have been worth my while had the killer been explained because what they did finally show of him at the end could have made him a very intriguing character.I'm usually not a harsh critic, but I wish I'd read the reviews before renting this.