Another addition to the killer interview questions collection: what superpower would you give to our best friend.
That question is in use at Dropbox. Indeed, the roundup of questions posted on Glassdoor by Dropbox candidates includes several odd options, including how you'd explain Dropbox to an elderly relative, how you'd calculate the number of Dropbox users and how you'd use Dropbox in a car or a toaster.
Those questions all suggest two things: you need a deep familiarity with Dropbox as a product, and you need a degree of imagination. Those factors should inform how you would reply to the superhero question. Rather than a glib answer ("the ability to produce infinite beer") or a product-centric suckup ("I'd install Dropbox in their brain"), you'd need to pick out something more creative. I'm thinking perhaps a metal plate in the head that can help improve mobile phone reception, but which doesn't show up on airport scans.
How would you answer the question?