Warhammer 40K Tabletop XII: "Now in Rapid Fire range!"

[Razaele]

Sure, no problem.

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Q: If a transport vehicle is destroyed in the same turn as it
moved flat out what happens to any embarked models? (p70)
A: They are removed as casualties.

Q: What is meant when the term ʻturnʼ is used? (p9)
A: Whenever the word turn is used it means player turn.
Otherwise it will clearly state game turn. In a complete
game turn both players get a player turn. Hence one game
turn will comprise two player turns.

Basically, this event only happens when you move flat out, end your turn on difficult terrain, and roll a 1. At least, that's how I interpret it.