Castiel wasn't one who normally chatted much, but others did sometimes feel awkward because of his natural silence on occasion. Even if he were unable to talk for awhile, that didn't mean he'd start chatting it up now. Instead, he frowned to himself and once an arm was free, he started helping pry the clasps off of him.

"There was a book and I.. just got stuck like this." Nothing really came before it that he could remember.

Hearing others coming did make the angel concerned, since he didn't know if those people would be friendly or not. And then Rose imparted her information, which only made Castiel look a bit surprised. He said nothing on the matter though and worked at freeing his legs as the pair came down the yellow brick road.