Progression of the blowout jet of 2008 December 4 observed in coronal X-ray images from Hinode/XRT. The jet's base arch is at the limb in the southern polar coronal hole, appears to be viewed mostly from the side, and spans about 15,000 km in the plane of the sky. Each southward slanted arrow points to brightening in the interior of the base arch. Each northward slanted arrow points to the lower leg of the front strand or front edge of the jet's spire, which edge appears to be rooted west of the jet's miniature-flare-arcade bright point at the west end of the base arch. The universal time is in the lower right corner of each frame.