Surprising

Characters are enjoyable.

The plot is okay. It gets better after the accident.

Bobbi must be imaging things, right? And then her sister Corky starts to notice something's amiss too, but how do they explain Jennifer's behavior?

Strange things start happening to some of the cheerleaders. The mystery grows more obscure, and then. . .the ending--a shocker! I don't know how Stine always manages to surprise us in the end, but he sure does a good job at it!