Reminds me of one of NASA's reckless ideas, abandoned after Challenger in 1986, to put a liquid hydrogen stage inside the cargo bay of the Shuttle orbiter [0]. That would have likely leaked inside that confined volume, and could plausibly have exploded in a similar way as Starship.

[0] https://en.wikipedia.org/wiki/Shuttle-Centaur

- "The astronauts considered the Shuttle-Centaur missions to be riskiest Space Shuttle missions yet,[85] referring to Centaur as the "Death Star".[86]"