Everything happened so fast that she began to wonder if Bart had somehow managed to find her and take her to Cas. Before she realized what was happening, she found herself on top of the car, feeling just a bit nauseous.
"Hey...Cas..." It came out a bit slow as she tried to steady herself, hearing the whoosh of the doors closing and knew they'd be on their way. "Couldn't have just walked the way there, huh?" She gave him a small grin, feeling a bit better; at least they were out in the open air, the crisp autumn air surrounding them.
"If I start to fall, you'll catch me, right?" It was more intended as a joke, although she knew Cas would take it literally. Probably for the best as the car below them began to move and she shifted her feet to feel more planted on the roof.