Castiel makes a show of thinking.

"I might have something interesting to show you."

Or not. The door to Milliways might be long gone by the time they get back to his cabin, and he'll have dragged Dean over there for nothing.

But Castiel spent a very long time living his life by faith. Those days may be gone, but some habits die hard.

"Come with me for a minute."

He waves the end of a crutch in a vague Come along gesture.