It’s the classic pre-trip selfie. You snap a picture of yourself with your passport and boarding pass, then promptly share the photo on social media. Your family, friends and followers may like it.

The passenger, posting under the username Conman094455 on Reddit this week, shared how a boarding pass mix-up set off a chain of events just before takeoff. The original poster (OP) wrote that ...

When you’re picking vacation photos to post on social media, there are some you should leave out: any shots of your boarding pass. Outside their primary function at the airport, the documents ...