Castiel, Bobby, Sam and Dean were driving along the countryside. For some Sam was driving and Bobby was in the front seat.

"Punch buggies no take backs!" Dean says and punches Cas.

Cas looks at Dean confused."What's a punchbuggy?"

"It's a type of car Cas."

Then Cas started looking out Dean's window and pointing to cars. "Is that a punch buggy?"

"No that's a van."

"Is that a punch buggy?"

"No that's a truck?"

"Is that a punch buggy?"

"No that's a limo."

"Is that a punch buggy?"

Dean sighed. "Yes that's a punch buggy."

Then Cas punched Dean's shoulders. "Punch buggy no take backs!"

Sam laughed.

"It's not funny Sam."

"Oh but it is," Sam replied and he laughed again.

"Seriously Sam last time I let you drive."

"Idjits."

"I don't get the joke," Cas said.