SKYWALKER, METAL - MEDIUM SIZE DOUBLE CLANK

This's a Skywalker Sound sound effect.

Movies

 * Pirates of the Caribbean: At World's End (2007)
 * The Sky Crawlers (2008)
 * Transformers (2007)

Audio Samples
One good source to reference is the closeup shot of a bomber beginning to explode in "The Sky Crawlers". This sound is heard from a car being hit/tipped over from an explosion in "Transformers" where the sound grows very quiet.