"Well, yeah, 'course 'm not crazy, I know that," he says. Say one thing for Radar: he's never doubted what his ears tell him, even when they're telling him things nobody else knows.

A pause. Slowly, his eyes widen in delight. Like the gradual toppling of a tree, he falls back into helpless giggling.

"I'm ahead of you," he squeaks out. "'Cause I can see the future!"

Clearly, this is the funniest joke he's ever heard in his life.