Is an obvious lie a vibe?
It's a positive vibe that Booger said what he said. If he had said, "I'm not thinking about that at this point," it would have been a totally different message.
Booger drops the hint it could happen and if Big Mac jumps to say how much he enjoys the city, working with these guys, and how great it is to have an owner like Booger, Booger knows Big Mac is ready to sign up for more of the same.
Big Mac played it down, directed it as a team thing, and avoided the follow up question of, "would you sign if you were extended today?"