I recently took my first trip on Southwest Airlines, with my first layover in Chicago Midway. It’s a fairly mundane airport, really, though anyone who’s seen the show Airline will recognize the scenery.

While strolling down the concourse, however, these doors caught my attention:

Beside the completely open passageway spanning the entire width of the concourse are two tiny doors to be used “For Emergency Only.” Please, in a calm and orderly manner, move over to the right, open the door, and step through.

(Full disclosure: a gap in the ceiling suggests a gate can be lowered across the concourse to seal it off, but this does not make a freestanding “emergency only” door any less hilarious.)