See if you can answer the question by watching this video.
(Hint: there is a clue at 16:30 in the video)

https://www.youtube.com/watch?feature=player_detailpage&v=Oir9LjWXhAs#t=979
(Hint: there is a clue at 16:30 in the video)

https://www.youtube.com/watch?feature=player_detailpage&v=Oir9LjWXhAs#t=979