asking the big questions

Someone who asks questions that are at a whole different level of understanding than the rest of the audience.

Sandy: Why does 1 + 1 = 2 Mr Teacher?
John: When did you decide you were going to teach 6 year olds what could barely pass as arithmetic instead of following your dreams of becoming an astronaut Mr teacher?
Mike: *nudging tony* John asking the big questions
*Tony nods in agreement*