Nightwing & Flamebird was such a fun concept in the Silver Age. The fact that Superman would still fight crime in a place that nullified his powers just showed how heroic he truly was, not to mention that ist showed that he picked up a lot of pointers from his adventures with Batman and Robin. Then he let Jimmy Olsen join in on the action, solidifying his title of Superman's Pal. The costumes were pretty cool, too!