"You're in a helicopter!"
Perhaps an unexpected style of answer, I agree, but I'm not sure it's actually wrong...
A/C's response reminded me of a joke a colleague told me awhile back. It goes something like this:
Two folks were flying in a helicopter along the west coast (of the US, for our Continental readers). At one point, a fog bank rolled in, and they became disoriented. After flying for a while, the pilot decided to descend to see if he could find some visible landmark he could use to regain his bearings. He descended into what looked like a college campus. On the ground he spotted a couple of folks looking back at them. He got on the 'copter's speaker, and asked, "Where are we?" One of the folks on the ground produced a marker and a large piece of cardboard, on which he scrawled: "You're in a helicopter!"
The pilot put on a wry grin, turned to the passenger and said, "I know exactly where we are. We're in Redmond, Washington and that's the Microsoft campus." The passenger, looking more than a little puzzled, asked, "How can you possibly know where we are from that response?" "Easy," the pilot replied. "I know we're over the Microsoft campus, because that answer is technically correct, and absolutely useless."