Please don’t think about Sam after Dean told him that Cas “played” him on his bedroom so he can take the colt from under his pillow.
Just avoid to think about Sam asking:
How Cas would have know where exactly to search for the colt ?
For your own sanity please think on anything else but Dean’s explanation that he must had “felt it” when he went into his bedroom to return him the MIX TAPE of Led Zeppelin that he had made for him.
And of course later just ignore the fact of how the head of Sam exploded when he focused on trying to understand how Cas could had felt the colt under Dean’s pillow.