Probably something cool

As She entered the 6th car Rebecca was relieved to find another innocent looking passenger car identical to the first three, stepping in She closed the door behind her which shut with a *click* reaching back She tried the handle, it was locked. Pangs of dread shot through her, there was no turning back now. Checking the car as she had with the first three She noticed the air had cooled nicely and at the very least it was comfortable now. Finding nothing She headed to the next car only to find yet another passenger car, confused she checked it and proceeded on... to yet another passenger car. Thinking back to when she was in the station She didn't remember the train being this long. Her heart sank as She read the sign on the next door