You better watch out (I'm telling you why)

Panel from Batman: Shadow of the Bat #68 (November 1997), script by Alan Grant, pencils by Jim Aparo, inks by Stan Woch, colors by Roberta Tewes, color separations by Android Images, letters by Bill Oakley

And now as a special Halloween bonus, here's a rare appearance of the Batman in a Marvel Comic Book!: Oh, okay, it's actually Red Wolf.
Panel from The Avengers #80 (September 1970), script by Roy Thomas, pencils by John Buscema, inks by Tom Palmer, letters by Sam Rosen