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In the airplane zone

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Maybe it's because Air just came on our iTunes shuffle or we are chugging way too much caffeine, but this photo went from being a cool shot to totally trippy. This appears to be a human head, but upon staring at it for too long, it looks sort of alien-like. Or is it someone's knee? And why are they so insanely tall and towering over their seat? You lost us.

Photo by nosha, more photos on Flickr.