I watched it when I was young and I've always wanted to see it again:

This girl is on this train and she steals someone's food or something and then she starts getting spikes or something? I know she is on a train and i think she wasn't supposed to be on there and then when she is off the train she goes and gets with this guy and he sees that she is like dangerous while they are having sex and I think she kills him.

Someone think I need to watch it again~

Katy Perry: Part of Me I think. You should buy it in DVD and blu-ray.

she goes and gets with this guy and he sees that she is like dangerous while they are having sex and I think she kills him.

.. and you say you watched this movie as a child?

Originally posted by BlondeSouth Species?

I just searched up the trailer and it looks just like the one I was thinking of! thanks

Originally posted by KillingYourCareer Katy Perry: Part of Me I think. You should buy it in DVD and blu-ray.