Instruct: Classify Amazon reviews into positive or negative sentiment
Query: WHAT A RIDE!

A smart thriller of a movie, this one traces the accidental creation of a mutating bacteria that turns people into blood-spewing (and spilling) killers. While the general concept is not new, the strength of this movie lies in the smart storytelling, lingering over character development, giving us reason to care for the characters long before all hell breaks loose, and focusing on the story behind the breakout of the bacterial plague. The characters feel like real people, with real lives, real problems. Although there are plenty of other killer virus/plague/zombie movies out there, none are as believably told as this. Definitely worth watching, and watching again.