Casper

When Kat is riding in the red machine chair, the chair stops before the shaving cream and it dies down. But then when Dibbs and Carrigan go down, Dibbs is covered in shaving cream. Why did Kat's chair stop? It didn't know who it was. Why did Dibbs' and Carrigan`s chair keep going?

There is a scene where Kat and Casper are talking in Kat's bedroom. Kat is sitting at her vanity brushing her hair and Casper is sitting on her jewelery box. They are talking about why Kat won't take Casper to the Halloween party. Casper asks what the other guy has that he doesn't. One thing Kat says is that the guy has a reflection. Casper looks in the mirror and he doesn't have a reflection. The thing is, neither does Kat. She is sitting right in front of the mirror and yet you don't see her reflection.