About the only unusual thing was a Q-tip spotted behind an instrument panel in the cockpit. How it got there was anyone's guess. Space Shuttle Endeavour probably had the weirdest piece of debris when it came to California for an inspection and tune-up in 1996. Workers found a small, mummified tree frog under a panel in the rear of the shuttle's cargo bay. Because California has no tree frogs, technicians assumed the amphibian must have jumped or crawled aboard sometime after Endeavour landed at Cape Canaveral, Fla., and before it was ferried to Palmdale atop a Boeing 747.
Legend has it the frog was one piece of foreign-object debris that never made it to the trash.