John Oliver has a show on HBO called Last Week Tonight, and has started a series of interviews of people with "good brains".  He calls it, "People Who Think Good", and he starts it off, appropriately, with Stephen Hawking.

Who'd have thought the legendary genius would be as funny as he is?

Oliver: Is there a possible parallel universe where I'm smarter than you?
Hawking: Yes.  There's also one where you're funny.

This is just one great exchange during the interview.  Enjoy a smart guy getting all comedic!