Yeah! It turns out one of the tricks is to teach people to stand on only one tread, not across two of them. And hold the sodding handrail.

Seems so simple, and yet… 🤷🏼‍♀️ (and I say this having spent six teenage years falling *up* the school library stairs at least twice a week 🙄)

Oh yes, and I am not judging the lass at all, as you must understand: She had never seen a staircase do that, and did not realise that it could happen. She had not intentionally caused the accident. She was just a rural teen. And also yeah, I have fallen up and down nonmoving stairs.