For Dean, the car ride was absolutely awful. He was stuck in Sam's hot and stuffy pocket the entire journey. Dean wasn't even tall enough to reach the lip of the pocket. He would jump up and grab it but would fall back in when Sam braked or hit a pot hole. It was painful. He couldn't even shout to get his brother's attention as the music Sam was playing was way too loud. He attempted to sleep as well, but it didn't work with all the movement and the tight space.

It wasn't until the Impala was parked inside the bunkers motor pool that the pocket was opened and Dean was lifted out.
"I'm sorry Dean" Sam muttered, noting his brothers displeased expression.
"It's alright Sammy" Dean sighed and Sam walked straight to the library. Surely the men of letters had files and books and whatever else on spells and curses and what not. But of course, Sam did all the research. He was reading through files on witches while Dean was pacing the table top.
"Dean why don't you help me instead of pacing the table?" Sam asked him. The tiny hunter glared at him.
After a few more moments, Dean spoke up.
"Because Sammy, I can't even turn a page or lift a sheet of paper, let alone lift a fucking book!" He replied angrily and kicked at a nearby book. Pain shot through his foot. "And before you ask, or do anything, I don't need your help!"

Dean hobbled to the other end of the table, away from Sam. He was the one who looked out for Sam and now that he was the size of his thumb and he couldn't protect his little brother. It frustrated him more than anything and he knew that he would need help but he wouldn't admit it, and he didn't want it.
Sam looked over at Dean, feeling guilty. Dean was obviously going through so much being less than two inches tall. He guessed it didn't help when he had carried Dean in his pocket, and kept him there during the car ride, but he was worried. Sam read the page again. According to the book, the spell should have been reversed. Then it occurred to him. The witch only had one victim at a time. She would kill the first and find another, yet she still had a victim. Dean. The witch had to be alive. The question now was how?