Talk about a crappy situation.

An American Airlines passenger says their recent Dallas-to-Philly flight turned into a nightmare after a fellow traveler decided the middle seat was the perfect place to change her baby’s diaper.

The Redditor, posting under the handle @throwfaraway212718, fumed in the r/americanairlines forum that the mother “somehow thought it was a good idea to change her baby’s rancid, s—t-filled diaper on the middle seat between her and her husband.”

The stench, they claimed, wasn’t just noticeable — it “woke multiple people up from a firm sleep.”

As if that weren’t enough, the poster said the parents allegedly left the seat dirty for the next unlucky flyer — failing to wipe up after the change.

The cabin floor didn’t fare much better : the pair reportedly toss

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