But if Sammy Davis Jr. had ever lived in Gotham City...
Okay, okay, point taken. Because Sammy Davis Jr. lived in Gotham City, he ought to have sung "keep your eye on the Batman." Because you know the moment you turn your back, for even just one glance at the rainswept city reflected in a moody noir fashion in your glasses, Batman will disappear on you.
Panel from Detective Comics #476 (March-April 1978), script by Steve Englehart, pencils by Marshall Rogers, inks by Terry Austin, colors by Glynis Wein, letters by Milt Snapinn
What can we take from this? First, Batman does not enjoy long goodbyes. Second, Batman is the World's Greatest Escape Artist, because there's no conversation he can't slip away from surreptitiously.
That's what August is all about. This month, all month, it's a celebration of Batman's Great Escapes, all those times he didn't stick around to hear the parting words of Commissioner Gordon (or, indeed, pretty much anybody else). If you've ever wanted to get out of a phone conversation by shooting the receiver and muttering "boring conversation anyway," take a tip from the Caped Crusader and learn, every day in August, how Batman is here today and gone today!