Batman Vol.1 #437
Just hit by a missile, the building containing mobsters and Batman, who tried to warn them, explodes. The helicopter that fired the missile flies away, it's occupants sure that "nothing could've survived in there".
Nightwing, searching for Batman, finds a bar he has recently ransacked looking for information on the gangland murders, beating one patron until he could no longer speak. He calls an ambulance, and getting the same information without threats, races to the same site Batman is at, where he finds the rubble of a destroyed building. He recovers a less than grateful Batman, who nearly calls him Robin, from the ruins who says he didn't need his help and claims he'd almost cleared the wreckage on his way to his way to a secret hideout before gruffly walking away.
Estimated Condition: VF/NM (Used)