Junior officer in flight suit crossing an open area without his cover (that means hat) is approached by a Senior officer.
"Where's your hat, captain?"
"It's in my pocket, colonel."
"Why isn't it on your head, captain?"
"Because I can't get my head in my pocket, sir."
(Amazingly, the dude without the hat eventually became an astronaut and then, after retirement, a writer for Steve Coogan.)