If the boomerang question fails and person A is not asked the question back then they can become extremely irritated.
Person B: Vanuatu.
Person A: Yea cool *waits expectantly*
Person B: You?
Person A: WELL I'm headed north for a while with some mates and then we're going to head east and west and all over the place and going to have a great time blah blah blah
Person B: Cheers for the Boomerang Question Trevor