After that, he was quiet for a few moments, just sitting there, his elbow propped up on the window and staring dully at the passing scenery, not looking all to pleased.

"Pull over!" Sherlock said suddenly, darting up from his seat and rather dramatically slapping the dashboard. "Pull over right now!" He demanded, looking over to John with wide eyes. "We have to stop!" It was clearly absolute.

Whatever had happened to Sherlock at the last pit stop had obviously changed him quite a bit. He wasn't exactly... different. But he was acting different and with Sherlock, acting different was... really notable, especially when he didn't seem to have any control over himself.