A Leigh Rubin cartoon from the 22nd, illustrating an exit and a dramatic exit:
First, this is a play on the ambiguity of exit, as a N referring to a concrete object (a door, used for exiting) or an act (of exiting). Then there’s another ambiguity, in the sense of dramatic in the nominal dramatic exit: it could be taken literally, as ‘pertaining to a play’, but here it’s used with a figurative sense ‘melodramatic, stagey, flamboyant’ (note the man’s gesture). In its second use, dramatic incorporates a figurative sense of the N drama seen also in the (originally US gay) slang compound drama queen.