That's LEGO masterbuilder Mark Kelso posing in front of his latest creation: the Invisible Hand, General Grevious' spaceship from Star Wars Episode III. Kelso's ship is huge: 73 inches (185) long, 13 inches (33 cm) wide and weighs about 30 lbs (13.4 kg).
http://mocpages.com/moc.php/45623 - via Gizmodo