Last year, All England Lawn Tennis Club chief executive Ian Ritchie told The Daily Telegraph that officials would "prefer to see less grunting, " a comment which unintentionally conjured up an amusing comic-book-style image: the visible grunt.

WSJ: Jason Gay: Confessions of a Tennis Grunter

Barely visible in this image are the sculptures by Josep Maria Subirachs, which have their own aesthetic language and because of that have proven to be somewhat controversial.

FORBES: Daily Travel Flashback: La Sagrada Familia 1, Barcelona, Spain

Participants were then asked to gauge how alive the image looked based solely on the one visible facial feature.

FORBES: Neuroeconomics: How Brain Science Matters to Business