Why did he have to fly above the cloud layer before engaging the Joker? While he was doing this little full moon routine, the Joker and his henchmen were literally firing with machine guns into the crowds of people. Maybe I'm a stickler here, just seems to me that this is not a great way of prioritizing.

>>212668568 (OP)
Probably checking the poisoned balloons he got rid of were still heading out over the ocean.